Today's romance fans have no shortage of ships to swoon over, but it hits a bit harder when the actors' chemistry can even be seen off set. In Prime Video's latest book-to-TV adaptation, Every Year After, rising stars Sadie Soverall and Matt Cornett portray an irresistible second-chance romance. Former childhood besties Percy (Soverall) and Sam (Cornett) spent every summer together in Barry's Bay, until their building romance was interrupted by an irreparable mistake. When Percy returns to mourn a loved one's death, old feelings reemerge and threaten to upend the life that Sam has built without her.

In honor of the series' streaming debut, Soverall and Cornett sat down with Marie Claire to test their friendship with a game of How Well Do You Know Your Co-Star?. The pair quickly proved how much they've learned about each other while making the show, as they guessed each other's favorite romance tropes, childhood celebrity crushes, and must-have snacks and sweet treats. Most tellingly, Cornett confirmed that the cast-mate he'd text first—minus Michael Bradway, who he considers his "brother" on- and off-screen—was Soverall. After all, he assured, he's "such a big Sadie Soverall fan."

Watch the full challenge above, then head to Prime Video to watch Every Year After, streaming now.

If you've been on the lookout for a new action flick led by fierce female leads, then Pretty Lethal should be your next watch. Prime Video's new thriller from the minds behind Atomic Blonde and Bullet Train stars five American ballerinas—Bones (Maddie Ziegler), Princess (Lana Condor), Grace (Avantika), Zoe (Iris Apatow), and Chloe (Millicent Simmonds)—who get stranded on the way to a life-changing competition in Budapest. When they check into a menacing inn run by Devora (Uma Thurman), the rivals have to use their high kicks and fierce dedication to fight their way out alive.

In honor of the movie's streaming release, Ziegler, Condor, Avantika, Apatow, and Simmonds sat down with Marie Claire to test their friendship with a game of How Well Do You Know Your Co-Star?. With the help of an offscreen interpreter for Simmonds, the young stars got competitive as they guessed each other's first jobs, first concerts, hobbies, favorite childhood books, and food pet peeves. It soon became clear that weeks of filming (and a month of "ballet-fu" trending) helped the quintet get extremely close.

Watch the full challenge above, then head to Prime Video to watch Pretty Lethal, streaming now.

Fans of Colleen Hoover novels know that it's best to grab a box of tissues before watching the big-screen adaptation of her 2022 book Reminders of Him. The tearjerker centers on Kenna (played by Maika Monroe), a woman newly released from prison after a car crash that killed her boyfriend, Scotty (Rudy Pankow). Unable to reunite with the daughter she had behind bars, the only person willing to give Kenna a chance is Ledger (Tyriq Withers), a local bar owner who was Scotty's best friend.

Given that devastating plot of the romantic drama, you wouldn't expect to describe the actors leading Reminders of Him as "goofy." But when Marie Claire sat down with Monroe and Withers for a game of How Well Do You Know Your Co-Star?, the two stars had a much more carefree chemistry than the emotional romance they portrayed onscreen.

In honor of the film's March 13 release, Monroe and Withers tested their friendship by guessing each other's favorite foods, guilty pleasures, most-used vocal stims, and most-iconic declarations of love. Though we provided multiple-choice options, the self-proclaimed besties didn't need them, as they had already gotten extremely close on set. After chatting with them, we wish we could hang out with the pair every day (especially if it means we'd get to hear more of Withers's impressions).

Watch the full challenge above, then head to your local theater to catch Reminders of Him.

When casting the first film adaptation of romance's most beloved author, instant chemistry between the leads was essential. Luckily, Netflix's take on People We Meet on Vacation found the perfect duo in Emily Bader and Tom Blyth. Not only are the stars already used to book-to-movie adaptations—from their previous roles in My Lady Jane and The Hunger Games, respectively—they also seem to have gotten very close in a short amount of time, just like their on-screen counterparts Poppy and Alex.

In honor of the movie's streaming release, Bader and Blyth sat down with Marie Claire to test their friendship with a game of How Well Do You Know Your Co-Star?, a task that the rom-com stars took very seriously. Though we provided multiple-choice questions, the pair were determined to go without, sifting through their memories as they answered questions from their childhood jobs and go-to karaoke songs, to their IRL dream vacations and the best rom-coms of all time. (You will never guess Bader's answer for the latter.) Although the American actress and the British actor had to look past a couple of culture clashes, we could feel the satisfaction whenever they high-fived over a correct answer.

Watch the full challenge above, then head to Netflix to watch People We Meet on Vacation, streaming now.

Last summer, Love Island USA viewers fell in love with an all-star trio of love-seeking besties: JaNa Craig, Leah Kateb, and Serena Page, a.k.a. PPG (the Powerpuff Gang). Since the season 6 finalists left the villa, the world has been their oyster, from their ongoing relationships with the men they met on the reality show to their thriving careers across social media, entertainment, and beauty. Now that summer's in full swing, Peacock has brought PPG back to our screens with a Love Island spinoff following their new superstar lives.

Ahead of Love Island: Beyond the Villa's premiere, Craig, Kateb, and Page sat down with Marie Claire to test their kinship with a game of How Well Do You Know Your Co-Star?. The trio quickly proved that spending the summer in the villa is the best way to learn everything about a person, as they sped through questions about first jobs, hometowns, and concerts without waiting for the multiple-choice options. They also took the time to share what they think a girl's girl is: "Women over men always."

Watch the challenge above to get the scoop on the classic film that inspired the name of Kateb's beloved dog, a spirited debate over Page's drink order, and Craig's NSFW story about her first concert. Then, head to Peacock to catch Love Island: Beyond the Villa.

Nearly 30 years ago, the cult classic I Know What You Did Last Summer cemented a cohort of stars as '90s Hollywood icons. Now, the highly anticipated revival, directed by Do Revenge's Jennifer Kaytin Robinson, ushers in a new era of scream queens. In the eerie reboot, a new group of friends from Southport, North Carolina (played by Madelyn Cline, Chase Sui Wonders, Sarah Pidgeon, Tyriq Withers, and Jonah Hauer-King) are terrorized by a harpoon-wielding killer with knowledge of their darkest deed.

In a perfect bit of casting, Wonders and Pidgeon were able to draw on their lifelong friendship—having met in community theater in the fifth grade—while playing once-estranged friends bonded by their trauma. In honor of the horror movie's release, the stars sat down with Marie Claire to test their kinship with a game of How Well Do You Know Your Co-Star?. The pair breezed through questions about their first jobs, first cars, and first kisses, pulling from their memories of growing up in the Detroit suburbs.

Watch the challenge above to get the scoop on their shared love of Wonders's The Studio castmate and Pidgeon's Tiny Beautiful Things co-star Kathryn Hahn, the college theater review that still haunts Wonders, and which famous Kevin is their celebrity crush. Then, head to your local theater to catch I Know What You Did Last Summer.

Netflix's popular horror franchise Fear Street is back from the dead with a new can't-miss high school slasher. Fear Street: Prom Queen, which hit Netflix on May 23, takes viewers back to Shadyside, Ohio, in the year 1988, as six girls locked in a fierce race for prom queen are targeted by a masked killer. For the revival, Netflix recruited several members of Hollywood's rising class of stars: India Fowler as wallflower Lori Granger; Red Rocket's Suzanna Son as Lori's best friend Megan; Barbie breakout Ariana Greenblatt as burnout Christy Renault; Fina Strazza as queen bee Tiffany Falconer, and Ella Rubin, Rebecca Ablack, and Ilan O'Driscoll as Tiffany's minions.

In honor of the movie's streaming release, Greenblatt, Rubin, and Ablack sat down with Marie Claire to test their friendship with a game of How Well Do You Know Your Co-Star?. The trio was all smiles as they answered questions about the sports they each played growing up, first concerts, and botched tattoos. When they weren't laughing so hard that they nearly cried, they were talking over each other while recalling the major bout of food poisoning that took Greenblatt out on her first day of shooting. (Also, if you ever see the trio out and about together, they may be doing joint driving lessons.)

Watch the full challenge above, then head to Netflix to watch Fear Street: Prom Queen, streaming now.

Getting over your ex is always easier said than done, but imagine how hard it'd be if your ex looked like Simone Ashley or Hero Fiennes Tiffin. Prime Video's original rom-com Picture This is the latest edition to the "exes rekindling" sub-genre of romantic comedies, as Pia (Ashley) and Charlie (Fiennes Tiffin) are reunited as the maid-of-honor and best man for Pia's younger sister's wedding. When a fortune teller predicts Pia will meet her soulmate on one of her next five dates, she goes on some memorable blind set ups, but there's something about Charlie that she can't shake.

To celebrate the movie's streaming release, Ashley and Fiennes Tiffin sat down with Marie Claire to test their friendship with a round of How Well Do You Know Your Co-Star?. The pair showed off their natural chemistry while breezing through questions about their early jobs, go-to karaoke jams, and hidden talents. Fiennes Tiffin also took the opportunity to praise Ashley, who also served as executive producer on the flick, for creating a "fun, relaxed" atmosphere on set.

Watch the challenge above to get the scoop on the unexpected hidden talent they both want to learn, the gift Ashley gave the entire cast, and insight into Fiennes Tiffin's Justin Bieber-inspired early red-carpet looks. Then, head to Prime Video to catch Picture This.

Every rom-com heroine needs a bestie to help her navigate the ups and downs of finding true love. As is the case with Kitty Song Covey and Quincy "Q" Shabazian on XO, Kitty, played by the adorable, IRL duo, stars Anna Cathcart and Anthony Keyvan. In the Netflix teen romance series' first season, Kitty (Cathcart) and Q (Keyvan) became fast friends as American exchange students in South Korea, and season 2 sees them reunite for another semester of academics and dating adventures.

Before XO, Kitty season 2's release, Keyvan and Cathcart tested their friendship with a round of How Well Do You Know Your Co-Star? In the game, the pair showed off how well they know each other's lore, from guessing their first non-acting jobs to sharing their Spotify Wrappeds to defending their favorite ice cream. Cathcart reminisced about dinners the XO, Kitty cast shared while filming in Seoul, while Keyvan shared an important travel tip: Make sure you get the conversion rate right while buying hotel massages.

To learn the pair's favorite thing to do while filming scenes together, watch the full challenge, above, then head to Netflix to catch XO, Kitty season 2, streaming now.

There's a particular magic that sparks among a group of women building unbreakable friendships while coming-of-age, and that power propels The Sex Lives of College Girls. Max's hit raunchy comedy follows a friend group at the fictional Essex College, as they become each other's ride-or-die besties and emotional rocks through the ups and downs of dating and university life.

The Mindy Kaling-produced series faced some major shake-ups going into its third season. Following the departure of main cast member Reneé Rapp, the show expanded its cast with several new faces, including rising stars Gracie Lawrence and Mia Rodgers as new members of the central friend group, which includes Kimberly (Pauline Chalamet), Whitney (Alyah Chanelle Scott), and Bela (Amrit Kaur). With season 3 just a few weeks into its airing, the new core fivesome's chemistry is already a match made in comedy heaven.

As season 3's first episodes arrived on Max in late November, we sat down with Scott, Chalamet, Lawrence, and Rodgers to play our favorite test of off-screen friendship, How Well Do You Know Your Co-Star? The actresses breezed through questions about their favorite Disney Channel Original Movies, childhood dream jobs, and go-to bakes, while mining their memories for fun facts they've learned about each other while bonding on set. Newcomers Lawrence and Rodgers reminisced on some memories of their jobs before landing on the Max hit, while Scott and Chalamet revealed the Broadway show that's their go-to for an impromptu karaoke session.

Watch the full challenge, above, then watch new episodes of The Sex Lives of College Girls every Thursday through January 23, 2025.

On October 15, the 2024 Victoria's Secret Fashion Show returned for the first time since 2018, bringing the U.S.'s biggest televised fashion show back to our screens. This year's catwalk promised the brand's most diverse cast yet with names like Josephine Skriver, Jasmine Tookes, and Ashley Graham gracing the runway for the event's big comeback. (Longtime vets—and IRL besties— Skriver and Tookes were returning cast, while Graham made her VS debut.)

Ahead of the show, the trio found a quiet corner amid the runway's bustling backstage to play a game of Marie Claire's "How Well Do You Know Your Costar?" The models showed off their trivia skills, attempting to guess each other's backstage must-haves and signature poses. In between reminiscing on their childhoods and the early days of their careers, Tookes and Graham also broke out into a quick sing-along after realizing they shared a go-to karaoke fav. (While the duo channel Shania confidence, Skriver prefers to scream out heavy metal.)

Watch the challenge above, then rewatch the 2024 Victoria's Secret Fashion Show on YouTube or Prime Video.

All Bravo devotees know that a friendship between Housewives can range from besties to frenemies. Last year, Andy Cohen and co. rebooted the reality TV franchise The Real Housewives of New York City with a cast of stylish standouts that represented the diversity of New York and the women who inhabit it, as new additions Sai De Silva, Ubah Hassan, Erin Lichy, Jenna Lyons, Jessel Taank, and Brynn Whitfield brought their aspirational lives (and complicated friendships) to the small screen for millions to see. The newly-arrived second season, which premiered on October 1, adds two new cast members, Racquel Chevremont and Rebecca Minkoff to shake up the group's dynamic.

To celebrate the release of season 2, Taank and Whitfield met up with Marie Claire for a game of How Well Do You Know Your Co-Star? While playing, the pair showed off how strong their friendship remains off-screen. In between accurately guessing each other's "landscaping routines" (a landing strip for Brynn) and dream fictional lives (Jessel wants a Clueless closet of her own—relatable), the besties also shared their candid takes on dog names and engagement-ring etiquette.

Watch the challenge above, then tune into Bravo Tuesdays at 9 p.m. ET for new episodes of The Real Housewives of New York City.

Cate Blanchett and Jamie Lee Curtis may be regulars at the Academy Awards—in fact, that's where they first met—but the two Oscar winners have never gotten the chance to share the screen. That all changes on August 9 when Borderlands, the movie adaptation of the beloved video game of the same name, arrives in theaters. Like many big-budget superhero movies, Borderlands has attracted a star-studded cast, with Blanchett and Curtis joining Kevin Hart, Édgar Ramírez, Ariana Greenblatt, and Jack Black (who, funny enough, also met Blanchett at the same Oscar ceremony) as ragtag heroes traversing an apocalyptic junkyard planet filled with violent marauders.

Ahead of the action film's release, Blanchett and Curtis channeled their badass characters for a very competitive game of Marie Claire's How Well Do You Know Your Co-Star?. The pair got a bit carried away, with accusations of cheating and fake tears flying, but the game hinged on the pair's undeniable mutual respect (and, yes, a little bit of cheating). Keep watching til after the game, when the pair reminisced about finally getting the opportunity to work together and how they've inspired each other.

Watch the challenge above, then head to your local theater to catch Borderlands.

In the best rom-coms of all time, the central couple's undeniable chemistry shines through even when they meet under the wildest pretenses. In Hit Man, Glen Powell's Gary and Adria Arjona's Madison's meet-cute is a mind-blowing one: She thinks he's a professional killer who she's hiring to murder her abusive husband (Evan Holtzman) when he's actually an undercover police contractor who's instantly smitten. Director Richard Linklater's crime film (which arrived on Netflix on June 7) follows the couple as the failed sting operation turns into a passionate, forbidden romance that's impossible not to root for up to its shocking ending, thanks to Powell and Arjona's excellent performances.

Ahead of the movie's streaming release, the Hit Man stars tested their friendship during a game of Marie Claire's How Well Do You Know Your Co-Star?, where they were tasked with guessing each other's first jobs, daily essentials, and ideal superpowers. The pair breezed through the questions as they showed how much they bonded over months of filming, from Powell constantly sneaking in compliments of the Puerto Rican actress and Arjona threatening to take the Top Gun actor's puppy Brisket home with her. Amid the flirty teasing, there was also a surprising instance of cheating(!), though we'll forgive this duo of anything.

Watch the challenge above, then head to Netflix (or your local theater) to catch Hit Man.

Babes costars Ilana Glazer and Michelle Buteau are closer than average castmates. How close? "We showed each other our pussies," Glazer told Marie Claire.

Their hilarious bonding experience should come as no surprise to fans of the actresses, who both have helmed beloved sitcoms (Broad City for Glazer; Survival of the Thickest for Buteau). In their new comedy movie Babes, co-written by Glazer and marks Better Things' Pamela Adlon's feature directorial debut, the duo play inseparable, lifelong friends entering new eras of their lives. Soon after Buteau's Dawn gives birth to her second child with her husband (Hasan Minhaj), Eden (Glazer) finds herself unexpectedly pregnant after a significant yet fleeting relationship. As they both face unforeseen pressures, their relationship is tested in this joyously gross feel-good film.

Before the wide release of Babes on May 24, Buteau and Glazer reflected on their friendship, spanning over 20 decades, during a game of How Well Do You Know Your Co-Star. Though the pair was admittedly nervous, they breezed through the questions while sharing stories about their adorable outings (including a Haim concert and themed Halloween parties), NYC's naming conventions ("either rockstar names or grandma and grandpa"), and what Buteau's theme would be if she had a Bat Mitzvah (think Coming to America).

Watch the challenge above, then head to your local theater to catch Babes.

Lady Whistledown may have it on good authority that Bridgerton fan-favorites Eloise Bridgerton and Penelope Featherington's friendship has hit a rough patch—especially going into season 3 of the Netflix series—but stars Claudia Jessie and Nicola Coughlan are still besties. In case you're not caught up on the Regency-era megahit (spoilers ahead!), longtime friends Penelope and Eloise had a massive fight at the end of season 2, after the latter discovered that the former was none other than the gossip columnist. Going into season 3, part 1's release on May 16, the TV besties are still on the outs, which becomes even more devastating once you see how close the real-life women behind them have gotten since Bridgerton first premiered in 2020.

Ahead of the highly-anticipated return to the Ton, we sat down with the acting duo to test how much they've gotten to know each other so much over the past four years, with a game of How Well Do You Know Your Co-Star? No surprise, they breezed through the questions and even shouted out some answers before hearing all of the options, recalling each other's stories of former jobs, beloved pets, and childhood crushes. (The answer to the last one? Leonardo DiCaprio and Jessica Rabbit. Feel free to guess who chose which.)

Watch the full challenge, above, then tune into Netflix to catch Bridgerton season 3, part 1 releases on Thursday, May 16. Part 2 will arrive on June 13.

The perfect road trip requires many things—a killer playlist, minimal traffic, plenty of snacks—but if we're only judging by chemistry, Geraldine Viswanathan, Margaret Qualley, and Beanie Feldstein are the perfect car companions. The trio of actresses star in Ethan Coen (one half of the legendary Coen Brothers) and Tricia Cooke's new lesbian crime flick Drive-Away Dolls, which combines a hysterical comedy of errors with a trippy callbacks to 1960s B-movies. In the film, Poor Things actress Qualley and Blockers star Viswanathan play friends who need a change from their mundane lives in 1999 Philadelphia. After reckless Jamie (Qualley) is caught cheating on her girlfriend Sukie (Beanie Feldstein), the wild child invites herself on prim Marian's (Viswanathan) road trip to Tallahassee. However, they're given a rental car that holds a mysterious suitcase, meant for a slick crime boss, called the Chief (Colman Domingo). The two women embark on a wild journey of zany mini-adventures, with the Chief's bumbling goons hot on their tails.

Ahead of the film's Feb. 23 release, we sat down with Viswanathan, Qualley, and Feldstein to play our favorite test of friendship, How Well Do You Know Your Co-Star? The on-screen friend group passed our quiz with flying colors, as they breezed through questions about their early jobs before acting, their high school superlatives, their favorite movies, and their random deep-set fears (some of which don't even have official terms). In one sweet moment, Feldstein and Viswanathan connected on how the classic 2011 comedy Bridesmaids changed their lives. "I was like, ‘Oh, this many funny women are allowed to be onscreen at the same time and people will love it?'" Feldstein said of watching the film as a high school senior. Fast-forward a decade, and now these three women are bringing a new inventive, hilarious comedy to the screen.

Watch the full challenge, above, then head to theaters to catch Drive-Away Dolls.

Kathryn Newton and Cole Sprouse have a lot more in common than their starring roles in Valentine's Day most horrifying date-night flick. They both came up as child actors (though a few years apart), they're both artistically inclined, and they both have the coolest stories. It's no wonder they have such chemistry playing a misunderstood high schooler and her reanimated corpse crush in Lisa Frankenstein, which hits theaters on February 9. Directed by Zelda Williams, and written by Jennifer's Body scribe Diablo Cody, the new Focus Features film introduces Lisa and her monster's ghoulish love story, as their joint quest for happiness brings about a bit more bloodshed than the average rom-com. This campy, irreverent comedy has it all: a magic tanning bed, bubblegum pink '80s aesthetics, a leotard-clad evil stepmother (played by Carla Gugino), and dazzling performances by Newton and Sprouse, two esteemed veterans within Young Hollywood.

Ahead of the film's release, we sat down with the duo to test their friendship with a trivia game we call How Well Do You Know Your Co-Star? They laughed their way through the friendly competition, as they answered questions about each others' first jobs, first concerts, and early red carpets. (If anyone can find Sprouse's first diaper commercial, we'd be grateful.)

Watch the full challenge, above, then head to your local theater to catch the flick.

The stars of My Life With the Walter Boys may be at the center of an angsty love triangle on-screen, but stars Nikki Rodriguez, Noah LaLonde, and Ashby Gentry are a much more friendly trio in real life. If you haven't heard of Netflix's latest hit yet, the teen soap (based on Ali Novak's Wattpad novel of the same name) follows the coming-of-age saga of 15-year-old Jackie Howard (Rodriguez). After she loses her entire family in a tragic accident, Jackie moves from NYC to small-town Colorado to live with her mother's best friend Catherine Walker (Suits alum Sarah Rafferty) and her loving family of 10(!) kids. Soon, as these stories go, Jackie gets entangled in a love triangle between two of the Walter brothers, Cole (LaLonde) and Alex (Gentry). 

My Life With the Walter Boys debuted on Netflix on December 7 and quickly found a passionate fanbase thanks to its dramatic plot (including that finale cliffhanger!) and charismatic main trio. With Rodriguez, LaLonde, and Gentry joining the streamer's roster of young stars, we wanted to see just how close the actors have gotten during their whirlwind rise to success. Following Walter Boys' season 2 renewal, we sat down with the group for "How Well Do You Know Your Co-Star?", our trivia game that tests the bonds of our favorite shows' casts.

For nearly 10 minutes, the stars answered questions about their celebrity connections, fast food preferences, and most listened-to artists over the past year. (Of course, we did film this during Spotify Wrapped season.) Each of the three contestants showed their own unique strategy: Rodriguez was calm and level-headed in a way that would make Jackie proud; LaLonde was surprisingly goofy, belting out Phoebe Bridgers songs and a nice Matthew McConaughey impression; and Gentry gave each of his guesses a passionate and thorough explanation (he even brought out a bit of astrology to guess LaLonde's celeb birthday twin). But was it enough to score some points? 

Watch the full challenge, above, then head to Netflix to catch (or re-watch) season 1 of My Life With the Walter Boys, streaming now. 

Gen V may be one of the most bloody, brutal shows on streaming, but it turns out stars Derek Luh, Lizzie Broadway, Jaz Sinclair, Patrick Schwarzenegger, Asa Germann, and London Thor are a much more giggly group off-camera. In the acclaimed college-set spinoff to Prime Video's The Boys, the young actors play a group of super-powered teens who uncover a conspiracy at their school and have to decide whether they want to be deadly corporate puppets or true, noble heroes. 

Season 1 of Gen V came to an end on November 3 with a jaw-dropping finale, capping off eight stellar episodes full of gory battle scenes and superbly-written characters who have to survive all of the struggles of adolescence (manipulative authority figures, social media scrutiny, romantic betrayal, etc.) turned up to the deadliest degree.

With Gen V already confirmed for a second season, we sat down with Luh, Broadway, Sinclair, Schwarzenegger, Germann, and Thor to test their friendship with a trivia game we call How Well Do You Know Your Co-Star? From the first laughing fit—which happened before the game even begun—it's clear that the actors are a fun bunch to hang out with between takes (probably while splattered in fake blood). The group laughed their way through the entire game, as they quickly guessed each other's real-life superpowers, celebrity crushes, and favorite on-set snacks. They also shared some memories from their time filming in Toronto, Canada, including Thor pulling together a birthday party for Sinclair with only two days notice, to Luh's non-stop Ryan Gosling discussions. (There's even talk of Luh getting a more permanent ode to his celebrity crush, though you'll have to watch to see what that means.)

Watch the full challenge, above, then head to Prime Video to catch season 1 of Gen V, streaming now. 

Just like in any workplace, it's typical to form bonds with your coworkers. But for Katie Cassidy and Stephen Huszar, that bond went a bit deeper. In Hallmark's A Royal Christmas Crush, the costars play architect Ava and Prince Henry, respectively, and while the two acted in love for the cameras, a true connection was forming off-screen. 

Now as a real-life couple, it's clear just how smitten Cassidy and Huszar are with each other, as we see in the latest episode of Marie Claire's "How Well Do You Know Your Co-Star?" Throughout the game, we tried to stump the couple with questions about each other's go-to breakfast, first jobs, and favorite vacation spots, but the two's connection runs deep. In between giggles and inside jokes, Cassidy and Huszar managed to keep the score neck-and-neck.

They also got into the sweet story of how their on-screen romance crossed over into real life. Cassidy recalled that while they both were very professional, after about a week on set she noticed Huszar in his "Stephen clothes" wearing crystal bracelets. "I asked him about them and I just started to learn about him, who he actually was," she said. "And yeah, I was just pleasantly surprised by this human being that I met." Huszar sweetly added, "Ditto, it took about a week and then we started to realize we're very similar in many ways so it's kind of looking at a reflection of each other." 

To hear how Huszar surprised Cassidy's parents the first time he met them, watch the full challenge, above, then watch even more of their chemistry unfold in A Royal Christmas Crush on the Hallmark Channel. 

After months spent filming a series, most co-stars tend to bond during their time on set. But for actors Gia Kim and Sang Heon Lee, their bond goes way deeper than just castmates. The two star in Netflix's XO, Kitty respectively as Yuri and Min Ho, two wealthy, popular kids at Kitty's (Anna Cathcart) boarding school in South Korea. While they seem friendly enough on camera, you may be surprised to hear that Kim and Lee are actually real-life sister and brother. 

In a round of How Well Do You Know Your Co-Star?, Kim and Lee tested their knowledge of one another. Given that they are siblings, you would think they would pass our test with flying colors...but, let's just say the trivia challenged brought to light some surprising secrets. 

During the game, the brother-sister duo dished on bucket-list items, first jobs, and childhood memories. At one point, Kim even revealed she had a secret flower tattoo, much to the surprise of Lee. The two also detailed how they both landed the roles in XO, Kitty and it was all thanks to Kim. She explained: "As soon as I saw the breakdown, I was like I'm going to go for this character, but this character, I can definitely see my brother selling really well, so I sent him the same thing." Kim continued, "We were both really hoping that both of us would get it and that there was no love line story between our characters because that would not be OK." 

To see Lee's hilarious reaction to Kim's most recent tattoo, watch the full challenge, above, then head to Netflix to catch XO, Kitty, streaming now. 

As far as onscreen couples go, chemistry doesn't get much stronger than Jamie and Claire from the Starz series Outlander. Over the course of the show, the two characters have been through the wringer. Think: the Jacobite Uprising in Scotland, the Revolutionary War in America, a witch trial, and even multiple imprisonments. But nothing can stop these two from being together. Plus, we can't deny that Jaimie and Claire have some of the steamiest scenes on TV, ever. With a couple as in love as Jamie and Claire, it should come as no surprise that the actors that play them have just as much chemistry off-screen. 

Ahead of season seven's release, Caitriona Balfe and Sam Heughan, who play Claire and Jamie, respectively, sat down with Marie Claire for a game of "How Well Do You Know Your Co-Star?" Right off the bat, it's clear Balfe and Heughan's friendship runs deep. In between questions about each other's first jobs, childhood celebrity crushes, and favorite movies, the two couldn't keep their giggles stifled. 

In the video, we also learn what Balfe's first impression was of Heughan when they met for their chemistry test. Unfortunately, she ran in as a "sweaty mess" after getting caught late in L.A. traffic, but that didn't stop Heughan from being a sweetheart. "He was very kind, and very calm, and he handed me a tissue, and he was just very sweet," Balfe recalled. "And then I asked for the tissue back," Heughan jokingly added. 

To hear more fun facts—including the musical instrument Heughan wants Balfe to play on set—watch the full challenge above. Then head to Starz to catch season seven of Outlander, streaming now. 

If you know a bit about history, then you may know the story of Catherine the Great and Peter III is not a happy one. As we see in Hulu's The Great, a dark comedy loosely based on Catherine's rise to power and Peter's demise, the two had a very troubled relationship, to say the least. In the series, Catherine and Peter are constantly at war with one another—whether it's through a coup, murdering the other's lover, or plotting assassination attempts. Thankfully, The Great's stars, Elle Fanning and Nicholas Hoult, aren't nearly as hostile towards each other as their on-screen counterparts. In fact, we'd say they are pretty friendly. 

Ahead of season three's release, we put Fanning and Hoult's knowledge of one another to the test in a game we call "How Well Do You Know Your Co-Star?" In between questions about each other's first concerts, favorite on-set snacks, and go-to trailer activity, we were treated to quite a few interesting tidbits about the two stars. For instance, Hoult knows how to make an "unbelievable" passionfruit margarita. 

We also found out about Fanning's unique childhood collection of chicken wishbones. "I used to break it off, and it's like the larger half and I would keep those in my purse," she revealed in between giggles. "I think they started to smell and so I had to get rid of them." 

To hear more fun facts—including how Fanning's trip to the hospital involved Ray Romano's son—watch the full challenge above. Then head to Hulu to catch season three of The Great, streaming now.