Finneas O'Connell is a Grammy-winning singer, songwriter, record producer, and actor. He's best known for his work with his younger sister, Billie Eilish, co-writing and producing her debut album, When We All Fall Asleep, Where Do We Go? and her current album, Happier Than Ever. He's also worked with other pop artists like Selena Gomez, Halsey, Camila Cabello, and Tove Lo.