If we've learned anything from Hollywood, it's that happily-ever-after, fairy tale endings don't always happen. Celebrity couples are often kept apart by extreme work conditions, like being stuck on separate sets halfway around the world from each other with irresistibly attractive co-stars, for example. And that can be a recipe for a major scandal. Ahead, we rounded up the most shocking celebrity affairs that shook the world.
In 1992, The Sun released a transcript of a recorded conversation the princess had with her alleged lover, James Gilbey, in which he called her "Squidgy." At the time, she was still married to the Queen of England's oldest son, Prince Charles, who was having an affair of his own with future second wife Camilla Parker Bowles.
Schwarzenegger's affair with his housekeeper, Mildred Baena, was kept a secret for 14 years—even after he fathered a child who looks exactly like him with her. "You can't go back—if I could, in reality, be Terminator, of course I would go back in time and would say, 'Arnold...no,'" he told Men's Journal. "You know, it's always easy to be smart in hindsight. That's not the way it works."
While married to Cynthia Scurtis, the Yankees player had an affair with Madonna. A source close to Scurtis told People in 2008, “The embarrassment over Madonna was the last straw [for Scurtis]. She flew to Paris to get out of town before everything blew up between them." A-Rod wound up paying Scurtis a divorce settlement of $26 million.
In 2010, at least four women came forward to say they had affairs with James while he was still married to Sandra Bullock. In an interview with the Daily Mail, James admitted to cheating. “Yeah, I did cheat on my wife, yeah, I stood up and took accountability for it and apologized. And that's the end of story," he said.
In March 2018, Colin Firth's wife Livia Giuggioli came forward saying that she'd had an affair with a childhood friend, journalist Marco Brancaccia, while she and her husband were briefly separated. The Firths have now accused Brancaccia of stalking Livia, alleging that he has "carried out a frightening campaign of harassment over several months, much of which is documented," according to The Times.
While filming the movie Titanic, Cameron fell for actress Suzy Amis, who played Lizzy Calvert at the beginning of the movie. The director lived with girlfriend Linda Hamilton at the time, and reportedly began going back and forth between Hamilton and Amis, but ultimately decided to marry Hamilton. The marriage lasted only eight months before he went back to Amis.
Soon after Princess Diana's affair was made public, so was Prince Charles' own daliance with his lifelong friend Camilla Parker Bowles. An Australian magazine released a transcript of their sexy bedtime phone calls, which memorably featured the two discussing what it would be like if Charles were to be Camilla's tampon (really). The scandal contributed to Diana and the Prince of Wales finally getting divorced. He married Bowles in 2005.
Fans were very disappointed when photos surfaced of Stewart and Sanders getting a little too close. She was very famously dating her Twilight co-star Robert Pattinson, and they ended their relationship over the affair.
“I lit my universe on fire and I watched it burn,” she said in an interview. “Speaking very candidly, it was a really traumatic period in my early 20s that kick-started something in me that was a bit more feral.”
In 1995, Hugh Grant was caught with a sex worker named Divine Brown and arrested for "lewd conduct" in a public place. At the time, he was with his longtime partner, Elizabeth Hurley, who tried to work through the incident. She ended up leaving Grant five years later.
Ryan had an affair with her Proof of Life co-star Russell Crowe while still married to her husband Dennis Quaid—and people couldn't help but notice the similarities between the movie's plot and her IRL affair.
Things were already going downhill in Woods' marriage with Elin Nordegren when—shortly after he crashed their car in 2009—reports of Woods' affairs with multiple women came out. Allegedly, he had 13 different partners.
Both Spelling and McDermott were married when they started their affair. Spelling told Entertainment Tonight that the two had sex the first night they met. Their relationship started when they worked together on the TV movie Mind Over Murder.
One of Hollywood's most earth-shattering affairs. Jolie fell hard for Pitt while they were working on the set of Mr. and Mrs. Smith—though she claimed nothing happened before Pitt's separation from Jennifer Aniston.
During his engagement to Sienna Miller, Law reportedly cheated with his children's nanny (he has three kids with his ex wife, Sadie Frost). Turns out Miller was also having her own affair with her Layer Cake co-star, Daniel Craig.
Sinatra became infatuated with Gardner when he first met her, but it took her some time to come around to him. They eventually fell in love while the singer was still married to his wife Nancy Barbato, whom he divorced for Gardner.
The former 19 Kids and Counting star actually paid for an "affair guarantee" through the cheating website Ashley Madison. He and wife Anna remained together through the incident.
Harrison reportedly was seeing younger women while he was with Melissa Mathison. Before deciding to officially separate, they released a a joint statement that said they had been living apart for a while. "We sincerely hope that we can work out our differences." When it didn't work, they separated in 2004.
"Fergie" (as she is often called) took a trip with American financial advisor John Bryan, and he was spotted infamously nibbling on her toes. She was still married to Prince Andrew, the Queen's second son, at the time. They divorced in 1996, just one month before Princess Diana and Prince Charles did.
During their infamous 25-year love affair, Tracy remained married to his wife Louise. The couple co-starred in nine movies together, but always lived separately. Only after Tracy's wife passed away did Hepburn come forward about their relationship.
Before he was with Melania, the current POTUS was married twice. His first marriage to Ivana Trump ended after reports of his affair with Maples (she became his second wife).
Monroe had an affair with playwright Arthur Miller, who wrote her lustful letters during her marriage to Joe DiMaggio. She filed for divorce from DiMaggio in 1954 and he wrote her his own letter, begging her to come back. Monroe eventually married Miller.
The Royal Air Force Officer spent a lot of time behind closed doors with the princess—because he was already married. Townsend went on to leave his wife for Margaret, but being in the spotlight kept them from ever marrying.
Monroe's sultry "Happy Birthday" to the president spurred rumors of an affair between the two. Monroe was also rumored to have had relations with JFK's brother, Robert F. Kennedy.
Six months after he married his longtime girlfriend Regina Lasko, Letterman admitted (after being threatened with blackmail) that he "had sex with women who worked for [him] on the show."
One of Hollywood's greatest love stories, began as a marital affair. Bogart, who was 25 years older than Bacall, fell in love with her while working on their film To Have or Have Not in 1944. His relationship with his alcoholic wife was slowly falling apart, and right after his divorce was finalized, the co-stars were married.
In the 1950s, Fisher and Taylor had one of the most scandalous affairs in Hollywood history. He was married to Debbie Reynolds at the time, and divorced her for Taylor.
Taylor's marriage to Eddie Fisher ended the same way it started—with an affair. The actress left her husband for her Cleopatra co-star Burton.
Allen began an affair with his longtime girlfriend Mia Farrow's adoptive daughter in 1992. The scandal was revealed when Farrow found nude photos of Previn that were taken by Allen. Though he was highly criticized, the director still decided to marry Previn in 1997.
Back in the '40s, the Italian director received a letter from Bergman suggesting that their work should be more flirty. Despite being married to other people, their affair started soon after she was cast in his film Stromboli.