Jennifer Lopez Celebrates Her 55th Birthday in a Sheer Toile Dior Dress and Studded Ballet Flats

But where is her birthday Birkin?

Jennifer Lopez bikes in the Hamptons wearing a sheer toile sundress and a slicked back ponytail
(Image credit: Backgrid)

Between idyllic Hamptons bike rides, birthday lunches, and a private, Bridgerton-themed party—complete with a custom Bridgerton manicureJennifer Lopez has been celebrating her 55th birthday week in style. Like a true Leo, she can't limit the festivities to just one day. Still, J.Lo saved her best birthday outfit for the official occasion on Wednesday, July 24.

Once again pedaling through the Hamptons on her white Linus bike, Jennifer Lopez chose her sweetest look of her ongoing trip to ring in year 55: a semi-sheer, turquoise toile Dior dress, plus studded Valentino ballet flats.

Jennifer Lopez rides her bike in the Hamptons wearing a sheer toile sundress and crisscross Valentino ballet flats

Jennifer Lopez spent her 55th birthday biking through the Hamptons in a sheer Dior sundress and Valentino ballet flats.

(Image credit: Backgrid)

Much like the white graduation mini dress she wore for stepson Sam Affleck's commencement, J.Lo's Dior birthday dress looks fit for a mint julep at a country club surrounded by 30-ft. hedges. The shirt dress construction and wallpaper toile print are all grown up; the sheer fabrication is a little sexy. Paired with her trusty white bicycle and a high ponytail, no one who saw her pedaling by could doubt it was her day. They could also guess she's a big fan of Maria Grazia Chiuri: from a woven Dior bag to a head-to-toe business casual 'fit, Lopez has been wearing the French house quite often this summer.

The singer completed her postcard-perfect outfit with a pair of ombré tinted sunglasses (most likely by Chloé, one of her favorite labels for oversize eyewear) and her diamond engagement ring. Lopez also cinched her semi-sheer dress with a white leather belt, and added gold hoop earrings for contrast.

Jennifer Lopez rides a bike wearing a semi sheer turquoise toile dress and studded ballet flats

Lopez's birthday dress is one of many Dior looks she's worn in recent months.

(Image credit: Backgrid)

Jennifer Lopez's 55th birthday wouldn't be complete with a single photo-op. Sometime before or after she dressed up in Dior, the "Let's Get Loud" singer hopped on Instagram, natural beauty on display in a low-cut Gooseberry Intimates white swimsuit. The same one-piece first cropped up in her Italian getaway wardrobe last month; this time, she paired it with stacks of Cartier bracelets. "This Is Me...Now," she wrote, referencing her recent album and her milestone birthday.

Jennifer Lopez takes a mirror selfie wearing a white low cut swimsuit and cartier jewelry

Jennifer Lopez also hit the pool, sharing a selfie in a white Gooseberry swimsuit and stacks of gold jewelry.

(Image credit: @jlo)

Over the course of her Hamptons vacation, Jennifer Lopez has managed to combine her love of runway fashion with down-to-earth, coastal cyclist styling cues. Just yesterday, she biked in a Hamptons floral set and fisherman sandals; days before, she's hit the sidewalk in everything from a Chanel T-shirt and flip flops to a relaxed take on the overalls trend, courtesy of Ralph Lauren. With the exception of two rare Hermès bags that showed up on a shopping trip, Lopez has mostly kept her extensive collection of designer totes back at the beach house.

If you thought this was a sign that Jenny from the Block is stepping back from opulence, think again. The singer took a beat on her birthday to share video from inside her Bridgerton-themed party last weekend—and the footage could have come from the set of the Shondaland show. Lopez wore a confectionary regency gown with tiers and tiers of tulle and embroidery (plus a birthday tiara); she and her guests waltzed around an outdoor dance floor while a live string quartet played. Lopez also treated her inner circle to some singing of her own, champagne in hand, before cutting into her birthday cake.

Jennifer Lopez's birthday trip to the Hamptons appears to come with everything a girl could want: perfect weather, an endless supply of breezy dresses and fisherman sandals, her close inner circle (minus her husband, Ben Affleck, who's back in Los Angeles). There's just one thing missing to make it the ultimate J.Lo fashion moment: a custom birthday Birkin.

Shop Sheer Dresses Inspired by Jennifer Lopez

Halie LeSavage
Senior Fashion & Beauty News Editor

Halie LeSavage is the senior fashion and beauty news editor at Marie Claire, where she assigns, edits, and writes stories for both sections. Halie is an expert on runway trends, celebrity style, emerging fashion and beauty brands, and shopping (naturally). In over seven years as a professional journalist, Halie’s reporting has ranged from fashion week coverage spanning the Copenhagen, New York, Milan, and Paris markets, to profiles on industry insiders like celebrity stylist Molly Dickson, to breaking news stories on noteworthy brand collaborations and beauty product launches. (She can personally confirm that Bella Hadid’s Ôrebella perfume is worth the hype.) She has also written dozens of research-backed shopping guides to finding the best tote bags, ballet flats, and more. Most of all, Halie loves to explore what style trends—like the rise of emotional support accessories or TikTok’s 75 Hard Style Challenge—can say about culture writ large. She also justifies almost any purchase by saying it’s “for work.”

Halie has previously held writer and editor roles at Glamour, Morning Brew, and Harper’s Bazaar. She has been cited as a fashion and beauty expert in The Cut, CNN Underscored, and Reuters, among other outlets, and appears in newsletters like Selleb and Self Checkout to provide shopping recommendations. In 2022, she earned the Hearst Spotlight Award for excellence and innovation in fashion journalism. She holds a Bachelor’s Degree in English from Harvard College. Outside of work, Halie is passionate about books, baking, and her miniature Bernedoodle, Dolly. For a behind-the-scenes look at her reporting, you can follow Halie on Instagram and TikTok.