Who Is Billie Eilish’s Brother Finneas O’Connell? 25 Facts You Didn’t Know About the Grammy Winning Producer

He Writes and Performs His Own Music, Too

Although he is known as a music producer and occasionally performs with his sister, O’Connell also has his own discography. He just released an EP called Blood Harmony this past October. He even toured throughout October 2019 to promote it’s release.