Who Is Billie Eilish's Brother?
Billie Eilish's brother is Finneas O'Connell. He is her full sibling and a frequent collaborator in her music career.
Finneas O'Connell's Career
Finneas is a singer, songwriter, and record producer. He has co-written and produced many of Billie Eilish's biggest hits. He is also known for his solo work and appearances on television.
The Sibling Collaboration
Finneas and Billie often write and produce music together from their home studio. Their close partnership has been central to her rise in pop music. You can read more about their work on Billie Eilish's official website.
