Billie Eilish has a famous brother called Finneas O’Connell.
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Billie Eilish: 15 facts about the 'bury a friend' singer you probably never knew
8. Billie Eilish has a famous brother called Finneas O’Connell.
Billie Eilish’s older brother Finneas O’Connell is a famous musician and actor best known for his starring role as Alastair in Glee. Billie co-writes the majority of her music with Finneas and he produces it. [Photo via Instagram