A Star-Studded Union: Finneas O’Connell and Claudia Sulewski Marry in Romantic Montecito Ceremony

In a weekend defined by glamour and heartfelt sentiment, Grammy-winning musician and producer Finneas O’Connell has officially wed his longtime partner, actress and entrepreneur Claudia Sulewski. The couple exchanged vows this past Saturday in an intimate yet star-studded ceremony held in the picturesque setting of Montecito, California.

The celebration was deeply personal, highlighted by a touching role for the groom’s sister, Billie Eilish. The Oscar-winning singer served as the officiant, standing by her brother’s side in a stunning green gown as he and Sulewski committed to one another. The couple’s beloved dogs, Peaches and Moose, also took part in the festivities, which were attended by the couple’s parents, Maggie Baird and Patrick O’Connell.

The wedding weekend was a masterclass in fashion, with Vogue reporting that the bride showcased four bespoke looks by Oscar de la Renta. Sulewski transitioned through these exquisite designs for the rehearsal dinner, the main ceremony, the first dance, and finally, the high-energy after-party.

The guest list read like a who’s-who of Hollywood, featuring an array of celebrity friends who came to support the newlyweds. Attendees included Justin and Hailey Bieber, Emma Chamberlain, Rachel Sennott, Rebecca Black, Jason Sudeikis, Kristen Bell, and Dax Shepard, alongside social media stars Devon Lee Carlson and Stassie Karanikolaou. Notably, Billie Eilish was spotted throughout the event accompanied by actor Nat Wolff, with the pair reportedly remaining inseparable during the celebrations.

The journey to the altar for the couple began in 2018 after a chance meeting on a dating app. Their connection was immediate; Finneas famously penned the song “Claudia” on the very first night they spent together. His creative inspiration remained tied to their romance over the years, most notably serving as the muse for his 2022 track, “Mona Lisa, Mona Lisa.”

After building their life together for several years, the couple officially announced their engagement in September 2025. Finneas proposed during a picturesque sunset, a moment they shared with fans in a joint Instagram post simply captioned, “Forever and ever 9.22.” With this weekend’s union, the couple has embarked on their next chapter, solidifying a bond that has been years in the making.