Finneas married Claudia Sulewski in Montecito, with Billie Eilish officiating the ceremony
Finneas O'Connell and Claudia Sulewski married on August 29, 2026, in Montecito, California, after nearly eight years together and less than a year after their engagement. Vogue confirmed that the couple exchanged vows on Saturday in front of family and friends, while People and TMZ published additional details about the ceremony and guests. Finneas's sister Billie Eilish had a special role and, according to those reports, officiated the ceremony, formally taking part in one of the most important family moments in her brother's life. The wedding was held at San Ysidro Ranch, a resort in Montecito in the Santa Barbara area, and the celebration was attended by numerous well-known names from music, film, television, and the world of digital media. Guests included Justin and Hailey Bieber, Nina Dobrev, Kristen Bell, Dax Shepard, Emma Chamberlain, and Jason Sudeikis, while the media also reported the arrivals of Rachel Sennott, Rebecca Black, Devon Lee Carlson, Stassie Karanikolaou, and other friends of the couple.
Billie Eilish took on one of the most important roles at the wedding
Billie Eilish's role was one of the most striking details of the ceremony. According to TMZ's report and photographs from the celebration cited by People, the 24-year-old musician was the person who officiated the ceremony at which Finneas and Sulewski exchanged vows. In this way, the family bond that has for years also been visible in Finneas and Billie's professional lives took on a completely different, private setting. The two have been writing and producing music together for years, and their collaboration has earned them some of the most important awards in contemporary popular music and film. According to TMZ, their parents Maggie Baird and Patrick O'Connell were also at the wedding, giving the event a strong family character despite the large number of celebrity guests.
The newlyweds' dogs, Peaches and Moose, added another personal touch. TMZ reported that they too were included in the celebration, while Vogue had revealed even before the ceremony that special bows had been made for them from the same silk fabric used for the wedding dress. During the final fitting for Vogue, Sulewski explained that the dogs would serve as a kind of "flower dogs", or four-legged attendants in the ceremony. That detail fit into the broader concept of the wedding, which, according to available reports, combined luxurious fashion production with a number of distinctly personal elements. A complete official guest list and a detailed ceremony schedule have not yet been made public, so the available information is based on reports by Vogue, People, and TMZ published on August 30.
Four Oscar de la Renta creations for the wedding weekend
Fashion was one of the central elements of the wedding weekend, and Claudia Sulewski chose four custom-made creations by Oscar de la Renta. Less than two weeks before the wedding, Vogue followed her final fitting at the brand's Beverly Hills boutique and published details of all the looks. For the rehearsal dinner, she chose a long bias-cut gown in glossy satin, with a draped neckline extending toward the back. For the ceremony itself, she wore a voluminous ivory silk gown with a dropped waist, a structured pleated skirt, and an asymmetrical draped detail around the neck that extended along the train. Vogue noted that Sulewski looked for inspiration in the Oscar de la Renta archive and was particularly drawn to the more dramatic, almost "princess-like" silhouettes from earlier collections.
The ceremony dress was completed with a tulle veil placed beneath the bun, and the design also included a practical detail that the bride particularly highlighted: pockets. For the first dance and reception, she chose a structured dress with an emphasized peplum made from recycled feathers and decorated with crystal details. Vogue linked the choice of recycled feathers to the values of her skincare brand Cyklar, which presents itself as vegan and cruelty-free. The final look, intended for the party after the official portion of the celebration, was considerably more playful: a pink boat-neck top and a hand-draped silk skirt in a gray shade. According to Vogue, Sulewski found inspiration for that look in the early 2000s and archival Oscar de la Renta shows, so the four creations differed in silhouette and purpose but together formed a recognizable fashion whole for the entire weekend.
The relationship began in 2018, and music was part of their story from the start
Finneas and Claudia Sulewski met in 2018 through a dating app, according to earlier statements by the couple reported by People. Their relationship was connected with music from the very beginning: in 2019, Finneas said that he had started writing the song "Claudia" only a few hours after their first meeting and sent her parts of the song that same evening. Over the years, Sulewski also appeared in other creative projects of his. In the 2022 music video for "Mona Lisa, Mona Lisa", she not only appeared in it but also directed it, once again connecting their private relationship with Finneas's solo music work. It was precisely this years-long combination of a private partnership and occasional creative collaborations that made their relationship well known to the public long before their engagement.
The engagement took place on September 22, 2025, after seven years together, and the couple announced it two days later in a joint Instagram post. People reported that Finneas proposed to Sulewski at sunset and that the engagement ring featured a cushion-cut diamond. In later interviews, Finneas spoke about the pressure he felt while trying to keep the proposal plan secret and organize every detail as he had envisioned it. In an interview with People in October 2025, he said that after the successful proposal he felt great relief and that he would gladly let Sulewski take the lead in planning the wedding. The wedding held on August 29, 2026, thus took place a little more than eleven months after the proposal and rounded off a period that the couple publicly marked without excessively revealing private details.
Guests included numerous well-known figures from music, film, and the digital scene
The guest list additionally attracted the attention of American and international media. People states that Justin and Hailey Bieber, Nina Dobrev, Kristen Bell, Dax Shepard, Emma Chamberlain, Jason Sudeikis, Rachel Sennott, Stassie Karanikolaou, and Carter Gregory attended the celebration, while TMZ also lists Rebecca Black and Devon Lee Carlson among the guests. Such a mix of guests reflects the different professional circles in which Finneas and Sulewski move: from the music industry and Hollywood to the fashion, beauty, and online scenes. Rebecca Black was also among the people who attended the final dress fitting documented by Vogue, so her presence was connected not only with the ceremony itself but also with the wedding preparations. Still, the published lists do not necessarily represent a complete record of the guests, and by August 31 the couple had not publicly released a detailed official guest list.
Reports from the wedding mainly emphasize the more intimate character of the ceremony despite the large number of publicly known figures. Photographs and reports published after the wedding show that the ceremony at San Ysidro Ranch was held outdoors. The public does not yet know all the details of the program, music, speeches, or the evening portion of the celebration, so supplementing them with assumptions would be inaccurate. What has been confirmed is that family, close friends, the couple's two dogs, and several celebrity guests were part of the weekend, while the fashion details were documented in advance through Sulewski's collaboration with Vogue. That combination of controlled publicity and preservation of privacy is consistent with the way the couple has presented their relationship in recent years.
Finneas's career has been marked by his collaboration with Billie Eilish and major awards
The wedding attracted additional attention because of the groom's exceptionally successful music career. Finneas, who professionally uses the name FINNEAS, is a songwriter, producer, and performer, and gained most of his global recognition as Billie Eilish's key collaborator. The official Recording Academy profile states that by the 2026 Grammy Awards he had won 11 awards from 26 nominations, including the Song of the Year award for "Wildflower" at the 68th Grammy Awards. Among his most important honors are also two Oscars for Best Original Song, both won together with Billie Eilish. The Academy of Motion Picture Arts and Sciences records their victory for "No Time to Die" in 2022 and for "What Was I Made For?" from the film "Barbie" in 2024, further cementing their songwriting partnership's status as one of the most successful family collaborations in contemporary music.
For that very reason, the fact that Eilish officiated her brother's ceremony carries meaning beyond the usual detail from a celebrity wedding. Their public story has for years been defined by working together, from songwriting and production to appearances on the world's biggest stages, but at the wedding that relationship was visible primarily through a family role. According to TMZ, Eilish officiated the ceremony in front of their parents and the couple's friends, while People also highlighted her role among the key details of the event. This gave the wedding a clear personal touch without the need for a major public spectacle. For Finneas, who built his career both as a solo performer and as a producer behind numerous successful projects, August 29, 2026, will remain marked by an event unrelated to his discography or awards season, but instead to the conclusion of a nearly eight-year period of dating and the beginning of his marriage to Sulewski.
Claudia Sulewski combined on-camera work, a digital career, and beauty entrepreneurship
Sulewski, who is 30 years old, developed several parallel professional paths over the course of her career. People describes her as a host and actress as well as the founder of the Cyklar brand, and Sulewski also worked for years as a content creator on digital platforms. Alongside her work in front of the camera, she developed her own creative projects, and she demonstrated her experience behind the camera by directing Finneas's video "Mona Lisa, Mona Lisa". In its report on the wedding preparations, Vogue also highlighted her role as a beauty entrepreneur, particularly when explaining why materials aligned with the values of her brand were used on one of the dresses. The wedding therefore attracted an audience beyond the typical circle of music-industry followers, including fashion, the beauty sector, and digital culture.
For now, it is not known whether the couple will publish additional photographs, video, or a more detailed account of the ceremony after the wedding. Vogue gave the public an insight into the fashion side of the preparations, while People and TMZ were the first to report key information about the event itself, including the location, Billie Eilish's role, and part of the guest list. As of August 31, the available information points to a wedding that was carefully organized, while a large portion of the private moments remained outside the public eye. Most of the confirmed details concern the fashion, family roles, and the couple's long relationship history. For Finneas and Claudia Sulewski, the ceremony in Montecito represents a continuation of the relationship that began in 2018, now entering a new stage of life after their engagement in September 2025 and nearly eight years together.
Sources:
- Vogue – confirmation of the wedding date and location, as well as details of the four Oscar de la Renta creations and preparations for the ceremony (link)
- People – report on the wedding, Billie Eilish's role, guests, engagement, and the couple's relationship history (link)
- TMZ – details of the ceremony at San Ysidro Ranch, the presence of family, the couple's dogs, and additional guests (link)
- Recording Academy / GRAMMY.com – official information on Finneas's Grammy Awards and nominations through 2026 (link)
- Academy of Motion Picture Arts and Sciences – official information on the 2022 Oscars and the win for the song "No Time to Die" (link)
- Academy of Motion Picture Arts and Sciences – official information on the 2024 Oscars and the win for the song "What Was I Made For?" (link)