Finneas has married his longtime girlfriend, Claudia Sulewski, in a glittering Saturday ceremony reportedly officiated by none other than his sister, Billie Eilish.
The two exchanged vows in a lush garden setting at San Ysidro Ranch in Montecito, California, surrounded by family and friends, as seen in photos obtained by Deuxmoi.
Eilish, 24, who is set to make her feature-film acting debut in the upcoming adaptation of The Bell Jar, took on the meaningful role in an off-the-shoulder olive-green gown. Her boyfriend, 31-year-old actor Nat Wolff, was also among the guests.
The celebration drew a notably high-profile crowd, with Nina Dobrev, Kristen Bell, Dax Shepard, Justin and Hailey Bieber, Emma Chamberlain, Rachel Sennott, Stassie Karanikolaou, Jason Sudeikis and Carter Gregory all in attendance.
Sulewski, 30, a beauty influencer and longtime online personality, turned the wedding weekend into a fashion showcase with four custom Oscar de la Renta looks, according to Vogue. Her lineup began with a bias-cut rehearsal dinner dress featuring a draped back, followed by a ceremony ballgown with a drop-waist bodice and bell-shaped skirt. She later changed into a feathered reception look before ending the festivities in a pink-and-dove-gray after-party dress.
Finneas, 29, born Finneas Baird O’Connell, is a singer, songwriter and record producer best known for his award-winning creative partnership with Eilish, his 10-time Grammy-winning sister.
Billie Eilish’s brother, Finneas, wed longtime girlfriend Claudia Sulewski on Saturday in Montecito, California. The couple are pictured above in September 2025 after his proposal on a remote mountainside
Finneas’ famous sister reportedly officiated the star-filled wedding ceremony. Eilish and Finneas are pictured above attending the Grammy Awards on February 1
For the occasion, Finneas kept his wedding look timeless in a classic black tuxedo.
Finneas and Sulewski have been together since meeting on the exclusive dating app Raya in 2018.
As he told BuzzFeed, Finneas couldn’t get the brunette beauty out of his mind and wrote his song Claudia within hours of meeting her, including the lyrics: ‘Oh, I’m in trouble now / Come kiss me black and blue / Might last another round / But I’m gonna fall for you.’
Sulewski was also the inspiration and muse for his 2022 song Mona Lisa, Mona Lisa, and starred in and directed the song’s phone-recorded music video.
Last year, Finneas used his seventh anniversary as a ‘Trojan horse’ to propose to Sulewski.
The musician popped the question last September after seven years of dating, and later revealed he had staged the proposal like a highly calculated, secret operation.
‘I think she thought we were going to go do a little staycation at a beach,’ Finneas said on Today with Jenna & Sheinelle. ‘I was relying on her to be distracted by getting ready in the morning, and maybe sending a work email or something.
‘And I drove her to the airport. She was like, “Why are we at the airport?” We got on a helicopter, and I was like, “We’re taking a helicopter to a private campsite in the mountains,” and I brought a private chef with us. And so he cooked food for us, and then he got back on the helicopter and left.
The two exchanged vows in a lush garden setting at San Ysidro Ranch in Montecito, California , surrounded by family and friends. Above, Finneas and Sulewski in September 2025 after he proposed
The musician and the beauty influencer met on the exclusive dating app Raya in 2018. Above, Finneas and Sulewski on February 1 at the Grammy Awards
Sulewski had four dresses custom made for the weekend event by Oscar de la Renta, while Finneas wore a classic black tuxedo. Above, the couple on June 8 attending the Tribeca Festival Artists Dinner in New York City
‘We were marooned on the mountainside, and then we just had this really beautiful day out in nature. And then, I did ask [her to marry me].’
Finneas was very nervous ahead of proposing, particularly when it came to hiding the ring so Sulewski couldn’t find it until the right moment.
‘The ring was in a sock wrapped around another sock in my suitcase. And then there was one point where it was about to happen, and I was, like, ‘Hang on. One second.’ It was just lies all day,’ he quipped.
‘And I ran around, and I heard the ring, like, rattling in the box in my pocket. And so I went and hid behind a bush and untied the thing and opened it and tucked it back in its little slot, and then was, like, walking in a sort of ballet pose.’
Earlier this year, Sulewski praised Finneas for wanting to be involved in their wedding planning.
‘Finneas has had more input than I think he thought he would have, which is exciting for me because I don’t want to feel like I’m planning all this by myself,’ she said in a video shared to YouTube.
‘I’ve been really surprised by how many opinions my fiancé has had, and I love it because I want him to feel ownership of this special day for us.’
Sulewski insisted she wouldn’t be a ‘bridezilla’ but she mentioned she did want to be hands-on with the plans.
Eilish and Finneas are siblings and music collaborators who share a close family bond. Above, brother and sister in 2020 attending the Grammy Awards
‘As you guys can imagine, yes, I have PDFs, table inspo, florals, seating for the ceremony. I actually think that I will broadly be a Type B bride because I’m a very chill person. Like, I’m not stressed about the scheduling of everything,’ she said.
‘I’m not stressed about what weekend it lands on. There’s a lot of things that I am excited to just kind of go with the flow about and let the wedding plan itself.
‘I guess the one Type A thing about myself is that, yes, I will pull inspo, I will spend hours on the computer, I will draw up things and make graphics.’
She added: ‘But that’s just me being excited. I guess what I’m trying to say is I don’t feel like I’m going to be a bridezilla. Like, this is just going to be fun and filled with love. It’s been really exciting to plan so far.’
