Billie Eilish officiated her brother Finneas O'Connell's wedding to longtime girlfriend Claudia Sulewski on Saturday in Santa Barbara, California. The ceremony took place at San Ysidro Ranch.
Eilish, 24, wore an olive-green dress for the occasion and was seen wiping away tears during her brother's vows. Finneas wore a classic black suit, while Sulewski chose an Oscar de la Renta gown for the ceremony. Vogue reported that Sulewski wore four Oscar de la Renta dresses over the wedding weekend.
Notable guests in attendance included Justin and Hailey Bieber, Dax Shepard and Kristen Bell, Nina Dobrev, Emma Chamberlain, Jason Sudeikis, and Rachel Sennott. Eilish's boyfriend, Jesse Rutherford, was also present.
The couple, who began dating in 2018 after meeting on a dating app, became engaged in September 2025. Sulewski told Vogue that one of her wedding dresses "demands a moment of silence." Eilish had a virtual seat at Sulewski's dress fitting, expressing her admiration for her future sister-in-law.
Finneas, 29, and Eilish share a close professional bond, with Finneas having served as co-writer and producer on all of Eilish's music projects. Despite rumors of a rift, Eilish explained in an April interview with Elle that Finneas' absence from her recent "Hit Me Hard and Soft" tour was due to their busy schedules and his prior commitments, likening him to Rapunzel in a tower. Finneas also clarified to Elle that he prefers the showmanship of touring over the travel itself but misses his sister when she is on the road for extended periods.
Finneas previously told The Washington Post in 2020 that he felt fortunate to have a parallel music career with his sister, stating that he would have been "tortured" in an alternate reality where he was struggling independently.
