Billie Eilish’s brother Finneas married his longtime girlfriend, Claudia Sulewski, on Saturday, and the pop star reportedly had the honor of officiating the star-studded ceremony.
The two exchanged vows in a lush garden at the San Ysidro Ranch in Montecito, California, surrounded by family and friends, as seen in photos obtained by Deuxmoi.
Eilish, 24, who will make her big-screen acting debut in the upcoming film The Bell Jar, played her special role at Finneas’ wedding wearing an off-the-shoulder, olive green dress. Her 31-year-old actor boyfriend Nat Wolff was also present.
Other big guests included Nina Dobrev, Kristen Bell, Dax Shepard, Justin and Hailey Bieber, Emma Chamberlain, Rachel Sennott, Stassie Karanikolaou, Jason Sudeikis and Carter Gregory.
The beauty influencer bride, 30, had four dresses custom-made for the weekend event by Oscar de la Renta, per Fashionstarting with a bias cut creation with draped back for the rehearsal dinner, then a ball gown with dropped waist bodice and bell skirt for the ceremony, followed by a feather reception dress to get the party started, and ending with a pink and dove gray after party dress.
Finneas, 29, born Finneas Baird O’Connell, is a singer, songwriter and producer best known for collaborating with his ten-time Grammy Award-winning sister.
Billie Eilish’s brother, Finneas, married his longtime girlfriend, Claudia Sulewski, on Saturday in Montecito, California. Above, the couple in September 2025 after he proposed on a remote mountainside
Finneas’ pop star sister reportedly had the honor of officiating the star-studded ceremony. Above, Eilish and Finneas at the Grammy Awards on February 1
He wore a classic black tuxedo for his wedding.
Finneas and Sulewski have been together since they met in 2018 on the exclusive dating app Raya.
As he said Buzz FeedFinneas couldn’t get the brunette beauty out of his head 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 going to 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 telephone-recorded music video.
Last year, Finneas used his seventh birthday as a ‘Trojan horse’ to propose to Sulewski.
The musician popped the question last September after seven years of dating and later revealed that he staged the proposal as a highly calculated, covert operation.
“I think she thought we were going to have a little stay on a beach,” Finneas continued Today with Jenna & Sheinelle. “I trusted her to be distracted by getting ready in the morning and maybe sending a work email or something.
“And I took her to the airport. She said, “Why are we at the airport?” We got in a helicopter and I thought, “We’re taking a helicopter to a private campsite in the mountains,” and I took a private chef with me. And so he cooked us dinner, got back in the helicopter and left.
The two exchanged vows in a lush garden at the 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 in 2018 through the exclusive dating app Raya. 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 attending the Tribeca Festival Artists Dinner in New York City on June 8
‘We were stranded on the mountainside, and we just had a really nice day out in nature. And then I asked anyway [her to marry me].’
Finneas was very nervous before proposing, especially when it came to hiding the ring, so Sulewski couldn’t find it until the right time.
‘The ring was in a sock wrapped around another sock in my suitcase. And then there was a point where it was about to happen, and I was like, ‘Wait a minute. One second.’ It was just lies all day,” he joked.
“And I was running around, and I heard the ring rattling in the box in my pocket. And so I hid behind a bush and unclipped the thing, opened it and put it back in the slot, and then walked in a kind of ballet position, so to speak.’
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 of this myself,” she said in a video shared with YouTube.
“I’m really surprised by the 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 said she wanted to get started on the plans.
Eilish and Finneas are siblings and music collaborators who share a close family bond. Above, brother and sister at the 2020 Grammy Awards
“As you can imagine, yes, I have PDFs, table inspiration, flowers and seating for the ceremony. I actually think I’ll be broadly a Type B bride because I’m a very laid back person. Like, I’m not stressed about planning anything,” she said.
“I’m not worried about what weekend it lands on. There are a lot of things I’m excited about just going with the flow and letting the wedding plan itself.
“The one Type A thing about myself is that, yes, I will find inspiration, sit in front of the computer for hours, draw things and make pictures.”
She added, “But that’s just me because I’m excited. What I’m trying to say is that I don’t feel like I’m going to be a bridezilla. This is just going to be fun and full of love. It has been very exciting to make plans so far.”
