Billie Eilish Officiates Brother Finneas’ Star-Studded Wedding to Claudia Sulewski
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Love was in the air in Santa Barbara as Grammy- and Oscar-winning producer Finneas O’Connell officially tied the knot with longtime partner, actress and creator Claudia Sulewski. Adding an unforgettable, deeply personal touch to the ceremony, Finneas’ sister and frequent musical collaborator, Billie Eilish, served as the wedding officiant.
The romantic, star-studded affair took place on Saturday, August 29, at the historic San Ysidro Ranch in Montecito, California, bringing together close family, celebrity friends, and even the couple’s beloved dogs for an unforgettable weekend celebration.
Billie Eilish Takes Center Stage as Wedding Officiant
Standing before the floral altar between her brother and now sister-in-law, Billie Eilish led the nuptials in style. The pop superstar stunned in an elegant, olive-green off-the-shoulder gown as she guided the couple through their vows. Eilish attended the celebration alongside actor Nat Wolff, having previously teased her role as officiant earlier in the year.
Their parents, Maggie Baird and Patrick O’Connell, watched from the front row as the creative duo celebrated this milestone, alongside the couple’s rescue dogs, Peaches and Moose, who made a heartwarming appearance at the ceremony.
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Claudia Sulewski Stuns in Custom Oscar de la Renta
The bride turned the wedding weekend into a high-fashion runway, wearing four custom Oscar de la Renta looks across the festivities:
- The Ceremony Gown: An ivory silk faille ballgown designed with a drop-waist bodice, pleated skirt, and an attached scarf accent that flowed into a train.
- The Rehearsal Dinner: A chic pre-wedding silhouette tailored for an intimate gathering.
- Reception & First Dance: A movement-friendly gown made for dancing the night away.
- After-Party: A modern, high-energy mini-dress suited for late-night celebration.
A Star-Studded Guest List in Montecito
The intimate guest list featured prominent names across the music, film, and digital entertainment industries. Spotted celebrating the newlyweds at San Ysidro Ranch:
- Justin and Hailey Bieber
- Kristen Bell and Dax Shepard
- Jason Sudeikis
- Emma Chamberlain
- Rachel Sennott
- Rebecca Black
- Devon Lee Carlson
- Stassie Karanikolaou
- Jesse Jo Stark
From Dating App to the Altar: Their Love Story
Finneas and Claudia’s romance began in 2018 after meeting on a dating app. The connection was instantaneous—Finneas famously penned his romantic track “Claudia” on the very first night they met, followed by hits like “Mona Lisa, Mona Lisa” in 2022.
After seven years together, Finneas proposed during a sunset beach outing in September 2025, which Sulewski announced to fans with the caption “Forever and ever 9.22.”
Frequently Asked Questions (FAQs)
Who officiated Finneas and Claudia Sulewski’s wedding?
Billie Eilish, Finneas’ younger sister and musical partner, officiated the outdoor ceremony.
Where did Finneas and Claudia Sulewski get married?
The wedding took place at the San Ysidro Ranch in Montecito (Santa Barbara), California.
Who designed Claudia Sulewski’s wedding dress?
Claudia wore four custom looks throughout the weekend designed by Oscar de la Renta, including an ivory silk faille drop-waist ballgown for the altar.
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