Claudia Sulewski didn't settle for one spectacular wedding dress when she married Finneas O'Connell. She had an entire bridal wardrobe.
The 30-year-old actress, content creator and Cyklar beauty founder married Billie Eilish's older brother Finneas, 29, in a romantic outdoor ceremony in Montecito, California, on Saturday, August 29, following eight years together.
© InstagramAnd while the couple's nuptials attracted an impressively star-studded guest list, including Hailey and Justin Bieber, Nina Dobrev, Kristen Bell, Dax Shepard and Emma Chamberlain, Claudia's four custom Oscar de la Renta creations provided plenty of fashion drama of their own.
The bride worked with the legendary American fashion house on a different outfit for each stage of her celebrations: the rehearsal dinner, ceremony, first dance and reception, and after-party.
Vogue was invited inside Oscar de la Renta's Beverly Hills boutique less than two weeks before the wedding as Claudia underwent her final fittings, accompanied by her mother Beata Sulewska, her new mother-in-law Maggie Baird and friends Rebecca Black and Dru MacDonald.
© InstagramThe rehearsal dinner dress
Claudia began her wedding weekend in an understated satin gown that set the tone for what was to come. The elegant bias-cut creation was made from liquid crepe-back satin, with fabric draping around the neckline and continuing dramatically down her back.
The design immediately won the approval of her friends, who watched Claudia's relationship with Finneas begin eight years ago. In fact, Rebecca and Dru were both there on the night of the couple's first date, making their presence at the fitting particularly poignant.
The couple met through a dating app in 2018, and Finneas was so inspired by Claudia that he began writing a song named after her the night they met. She would later become the inspiration for his track Mona Lisa, Mona Lisa and directed and starred in its music video.
Claudia's 'princess' wedding gown
It was Claudia's ceremony gown, however, that delivered the biggest bridal moment. The ivory silk faille ballgown featured a dramatic drop-waist bodice leading into an architectural pleated skirt, while an asymmetric scarf-like neckpiece cascaded all the way down the train.
Claudia had searched through the Oscar de la Renta archives for inspiration and found herself repeatedly drawn to the fashion house's more dramatic, princess-like silhouettes.
© Instagram"There’s something about this dress that just demands a moment of silence," she told Vogue. Her mother-in-law Maggie was visibly impressed, but it was Billie's reaction that made the fitting particularly special.
The Grammy winner joined the group via FaceTime to see her future sister-in-law in her wedding dress and told Claudia she looked "like an angel." A long tulle veil designed to sit beneath Claudia's bun completed the bridal look, while the gown also contained one thoroughly modern and practical detail: pockets.
Billie Eilish's very special role
Billie didn't just get an early preview of her sister-in-law's wedding dress. The 24-year-old singer played an integral role in the actual ceremony by officiating her brother's wedding as Claudia and Finneas exchanged vows in front of their family and friends.
© Getty Images for The Recording AFor the occasion, Billie coordinated beautifully with the garden surroundings in an olive-green off-the-shoulder corseted gown with a flowing satin skirt.
The wedding reportedly took place at Montecito's luxurious San Ysidro Ranch, with Billie arriving alongside boyfriend Nat Wolff. Finneas and Billie's parents Maggie Baird and Patrick O'Connell were also there to watch their son marry his longtime love.
The first dance dress
For her third outfit, Claudia wanted something that felt decidedly more grown-up. She changed into a structured cady gown with a statement sculptural peplum fashioned from upcycled feathers.
The use of repurposed feathers was particularly meaningful to Claudia because her body-care company Cyklar is vegan and cruelty-free.
Tiny crystal-beaded details were scattered throughout the feathers, designed to catch the light once Claudia hit the dance floor.
© InstagramThe bride had even put the gown through a "dance test" before the wedding because she and Finneas would perform their first dance in it.
There was only one problem: Finneas wasn't allowed to see any of the dresses beforehand.
Claudia therefore had to give her husband-to-be some cryptic instructions about their choreography, particularly when it came to lifts, to ensure the sculptural creation survived their routine intact.
Claudia's playful pink after-party look
After three predominantly traditional bridal looks, Claudia completely changed direction for the after-party.
© InstagramHer fourth Oscar de la Renta ensemble took inspiration from the fashion house's early-2000s archives and the playful designs once worn on its runway by supermodels including Gisele Bündchen.
The bride wore a pink boat-neck top with a hand-draped dove-grey silk faille bubble skirt and coordinating grey heels, creating a youthful mini silhouette that allowed her to dance into the night. "I feel like a little cupcake," Claudia joked during her final fitting.
Their dogs had custom Oscar de la Renta too
There was technically a fifth wedding look, although Claudia wasn't the one wearing it. The couple's beloved rescue dogs Peaches and Moose were given their own Oscar de la Renta accessories for the ceremony.
Matching silk faille bows were created using the exact same fabric as Claudia's wedding gown so that the pair could walk down the aisle as the couple's "flower dogs."
It was a fittingly personal touch for Claudia and Finneas, whose relationship has included their pets almost from the beginning.
The musician proposed to Claudia in September 2025 after seven years together, whisking her away for a romantic mountaintop proposal before they shared the news with the words: "forever and ever 9.22."
Less than a year later, surrounded by their families, famous friends, two very well-dressed dogs and four extraordinary Oscar de la Renta creations, they finally made it official.
