Finneas and Claudia Sulewski Marry in Montecito, Billie Eilish Officiates

Finneas married Claudia Sulewski at San Ysidro Ranch in Montecito, California, last weekend. His sister, Billie Eilish, officiated the ceremony. The wedding followed a year-long engagement. The couple met on a dating app in 2018 and got engaged last September.

Guests included Justin and Hailey Bieber, Emma Chamberlain, Rebecca Black, Kristen Bell and Dax Shepard, Rachel Sennott, and Jason Sudeikis. Peaches and Moose, the couple’s dogs, served as flower dogs.

Finneas wrote the song “Claudia” within hours of meeting Sulewski, a detail that has trailed the relationship since its earliest days. His most recent solo album is 2024’s For Cryin’ Out Loud!.

The event placed a private milestone inside a wider public context. Finneas is known for producing and co-writing alongside Eilish, and his solo catalogue now runs alongside that work. A wedding with Eilish officiating and a guest list drawn from music and online culture reads less like a celebrity item than a small marker of the circles Finneas has moved through for the past several years.