Finneas and Claudia Sulewski are married after years together. The couple held their wedding in Montecito, California, in a lush outdoor setting. Billie Eilish, Finneas's younger sister, officiated the ceremony, according to photos from the event. The singer and songwriter played a special role in the wedding as her brother and Sulewski began a new chapter together. The Finneas Claudia Sulewski wedding brought together family, friends and many well-known guests. Photos from the day showed a warm outdoor setting in coastal California. Sulewski also made a strong fashion statement during the wedding weekend. The beauty creator wore four different looks across the events. Each look was custom made by Oscar de la Renta. For the main ceremony, Sulewski chose a strapless drop-waist ball gown. She also wore a neck scarf with the dress as she walked down the aisle. The guest list included several stars from music, film and online media. Hailey Bieber and Justin Bieber were among the guests. Rachel Sennott, Jason Sudeikis, Kristen Bell, Dax Shepard and Emma Chamberlain were also seen at the wedding. Nat Wolff, who is dating Billie Eilish, was also reportedly at the event. The gathering gave the couple a chance to celebrate with close friends and family. Finneas and Sulewski have been together since 2018. They first met through a dating app and soon began a long-term relationship. The couple took their relationship to the next stage in September 2025. They announced their engagement that month after several years together. Their wedding now marks a new step in their relationship. The pair have also shared parts of their lives and work with fans over the years. Sulewski is known for her work as a beauty content creator. She also founded skincare brand Cyklar. Her work in beauty and lifestyle has helped her build a large online audience. Before the wedding, Sulewski spoke about how planning the event had changed her daily routine. In a recent interview, she said that wedding plans had kept her busy and affected some of her usual habits. She said she had spent much of the year planning the wedding and events around it. She also noted that she had been reading less than usual during the busy period. Sulewski also spoke about her interest in learning about pregnancy, birth and fertility. She said she was listening to podcasts and researching topics linked to pregnancy, birth, and egg and sperm health. She made clear that she was not planning to enter that stage of life soon. Instead, she said she enjoyed learning about the human body and ways people can prepare for future health needs. Her comments offered a look at her interests beyond wedding plans and beauty. They also showed how she has been thinking about the next stage of her life. For Finneas, the wedding adds a personal milestone to a career filled with major achievements. He has built a successful career as a singer, songwriter and producer. He has also worked closely with Billie Eilish on her music. The California ceremony was a personal moment for the couple. With family, friends and famous guests around them, Finneas and Sulewski celebrated their marriage in a relaxed outdoor setting. Billie Eilish's role as the officiant made the day especially meaningful for the family. Her participation added another personal connection to a wedding already centered on close relationships. The couple's journey began with a meeting on a dating app in 2018. Seven years later, they became engaged. Now, after their wedding in Montecito, they are starting married life together. The Finneas Claudia Sulewski wedding also gave fans a glimpse of the couple's style and celebration. From Sulewski's custom gowns to the star-filled guest list, the event drew attention from fans around the world. The wedding marks the latest chapter in a relationship that has grown from an online dating match into a long-term partnership and marriage.