Billie Eilish Officiates Brother Finneas's Wedding to Claudia Sulewski

Billie Eilish officiated the wedding of her brother and producer Finneas to Claudia Sulewski on 30 August 2026 at San Ysidro Ranch in Montecito, California, TMZ and Billboard reported. Eilish wore an olive green gown. The couple announced their engagement in September 2025 after meeting on a dating app in 2018.