Private Montecito Ceremony Officiated by Billie Eilish Grammy and Oscar-winning producer and singer-songwriter Finneas O'Connell has married his partner of eight years, YouTuber and actress Claudia Sulewski. The intimate outdoor ceremony took place at the historic San Ysidro Ranch in Montecito, California. In a touching family moment, Finneas’s younger sister and primary musical collaborator, Billie Eilish, served as the officiant for the nuptials. The wedding brought together close family members—including parents Maggie Baird and Patrick O'Connell—alongside a star-studded guest list that included Justin and Hailey Bieber, Emma Chamberlain, Rachel Sennott, Jason Sudeikis, Kristen Bell, Dax Shepard, and Nat Wolff.Couture Fashion and Personal Touches Sulewski wore a total of four custom creations by designer Oscar de la Renta throughout the wedding weekend. For the main walk down the aisle, she selected a drop-waist ivory silk faille ballgown complemented by a pleated scarf neckpiece and an extended train. The celebration also included personal touches: the couple's rescue dogs, Peaches and Moose, served as "flower dogs," walking down the aisle adorned with custom bows crafted from the leftover fabric of Sulewski’s main ceremony dress. About the Newlyweds The marriage marks a major milestone for the high-profile creative couple. O'Connell, 29, has earned 11 Grammy Awards and 2 Academy Awards for his work producing chart-topping hits with Billie Eilish, including "Bad Guy", "What Was I Made For?", and "Birds of a Feather". Sulewski, 30, has built a massive digital following as a lifestyle content creator, actress (Shrinking, I Love My Dad), and entrepreneur behind the body-care brand Cyklar. The couple first met in 2018 and got engaged in September 2025 following seven years together.