Finneas Baird O'Connell, known mononymously as Finneas (stylized in all caps), is an American singer-songwriter, record producer, and actor. He has written and produced music for various artists, most notably his younger sister, Billie Eilish. He won six Grammy Awards, including Album of the Year, Producer of the Year, Non-Classical and the Best Engineered Album, Non-Classical for his work on Eilish's debut album When We All Fall Asleep, Where Do We Go? (2019).
