It’s official: Finneas O’Connell and Claudia Sulewski are married—and sister Billie Eilish gave them the ultimate wedding gift by officiating the ceremony!
The 24-year-old Oscar winner traded her concert mic for a minister’s role. She stood at the altar in a stunning olive-green corset gown to marry her brother and longtime collaborator. The intimate, star-studded affair took place on August 29, 2026, at the luxurious San Ysidro Ranch in Montecito, California. Additionally, the tight-knit O’Connell family celebrated alongside A-list friends like Justin and Hailey Bieber.
For a duo that has conquered the music world side-by-side, having Billie lead the ceremony felt like the ultimate, full-circle celebration of their unbreakable sibling bond.
A Family Affair at the Altar
According to candid photos and details published by @deuxmoi on Instagram, Eilish traded her concert microphone for the minister’s podium. The 24-year-old singer stood directly between her brother and his new bride to guide them through their vows. For the special family role, Eilish donned an olive-green, off-the-shoulder corseted gown. She paired it with her signature auburn bob and a dark lip color.
Beside Eilish, the bride stunned in a classic bridal look. Sulewski wore a custom white tulle ballgown by Oscar de la Renta, featuring a structured, strapless bodice and a voluminous skirt. She completed the look with a sheer tulle veil and minimal jewelry. As a result, the dramatic silhouette took center stage.
Reflecting on her stunning bridal look, Sulewski told Vogue that the custom gown immediately created an unforgettable vibe during her fitting. She shared that the dress “demands a moment of silence,” explaining that she was inspired to choose the dramatic, “princess-like” silhouette. This inspiration came after she explored the designer’s historic archives.
Montecito Magic With Hollywood’s Finest
GettyIn attendance was some of Hollywood’s finest! Among the celebrity guests captured in the crowd were Justin and Hailey Bieber, Emma Chamberlain, Kristen Bell, Dax Shepard, and Nina Dobrev.
Guests dressed in chic cocktail attire to watch the couple exchange vows against the estate’s mountain backdrop. Following her duties at the altar, Eilish was seen celebrating at the reception alongside her boyfriend, actor Nat Wolff.
Happier Than Ever
The star-studded nuptials cap off a beautiful seven-year journey for the longtime couple. Finneas and Sulewski first met on a dating app back in 2018, and their connection was almost instant. Creatively inspired by their early romance, he wrote his hit 2019 single, “Claudia,” the very night they met. Over the years, the pair have frequently shared glimpses of their life together on social media. For example, they posted moments from red carpet appearances at the Grammys to quiet times at home with their rescue dogs.
Before their big day, Finneas spoke exclusively to People about taking a backseat to his bride during the planning process, letting her creative vision take the lead. “I will be a hype man,” Finneas shared ahead of the wedding. “If she gives me multiple choices, I will give her my preference.”
