Billie Eilish's primary songwriting partner is her brother Finneas O'Connell
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Billie Eilish: 21 facts about the singer-songwriter you need to know
6. Billie Eilish's primary songwriting partner is her brother 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. [@billieeilish via Instagram]
