Finneas Marries Claudia Sulewski in Montecito, with Billie Eilish Officiating
Finneas, the 29-year-old producer best known for his work with his sister Billie Eilish, married Claudia Sulewski on Saturday, August 30, 2026, at San Ysidro Ranch in Montecito, California. Eilish officiated the ceremony, wearing an olive green gown for the occasion Hello!. TMZ first reported the marriage TMZ.
Eilish attended alongside her boyfriend, actor Nat Wolff. The couple's parents, Maggie Baird and Patrick O'Connell, were there to watch their son exchange vows Billboard. Even the couple's dogs, Peaches and Moose, were part of the celebration.
The guest list drew from across music, film and digital media. Justin and Hailey Bieber, Jason Sudeikis, Kristen Bell, Dax Shepard, Emma Chamberlain, Rachel Sennott, Rebecca Black, Devon Lee Carlson, Stassie Karanikolaou and Jesse Jo Stark were all in attendance, according to Billboard Billboard.
Sulewski wore four Oscar de la Renta looks across the wedding weekend, one each for the rehearsal dinner, the ceremony and first dance, the reception, and the after-party Billboard. The fashion house is a red-carpet staple, but wearing four custom looks across a single wedding weekend is a step beyond the conventional one-or-two-dress format.
The couple's path to the altar began on a dating app in 2018. By the end of that first day, Finneas had written a song called "Claudia" and sent it to her that night Billboard. Their creative partnership has continued alongside the personal one: Sulewski starred in and directed the music video for Finneas's 2022 solo song "Mona Lisa, Mona Lisa."
Finneas and Sulewski announced their engagement in September 2025 after seven years together. The Instagram post, captioned "forever and ever 9.22," showed a photo of the couple hugging on a hillside at sunset, a kissing selfie, and a frame of Finneas proposing on one knee Billboard. Sulewski posted engagement portraits on her Instagram account, @claudiasulewski, on July 2, 2026 Instagram.
Sulewski, named to the Forbes 30 Under 30 list in the Art & Style category, has built her own audience across acting and digital content Instagram. People.com confirmed the marriage in its own report, headlined "Finneas Marries Longtime Girlfriend Claudia Sulewski" People.
For a family whose working life is spent in recording studios and on tour stages, the wedding put the professional relationship on pause for one evening. Eilish, who has won multiple Grammy Awards for albums co-written and co-produced with Finneas, stepped into the role of officiant rather than performer. The dogs came too.
