Spoiler: Their love story is extremely cute.

The music producer and YouTuber have been together since 2018.

Finneas O’Connell and Claudia Sulewski’s Aug. 29 wedding was officiated by his sister, Billie Eilish ...

Eilish wore an olive green dress as she played a special part in her brother and music collaborator's nuptials.

And Finneas’s sister, Billie Eilish, officiated!

Classic elegance and modern-day sophistication meet in Finneas and Claudia Sulewski's luxe yet laid-back multi-day wedding ...

The couple tied the knot in an outdoor ceremony in Montecito on Saturday, Aug. 29 ...

The model pulled out another vintage gem for the occasion ...

New photos from Finneas and Claudia Sulewski's wedding weekend showed the groom's sister Billie Eilish's second gown for the ...

Finneas O’Connell and Claudia Sulewski’s wedding was a star-studded affair! The “Lotus Eater” singer, 29, and his longtime ...

Billie Eilish officiated the wedding of her older brother and longtime musical collaborator, Finneas O’Connell, as he married ...