Nearly every song the 17-year-old star has ever released was co-written with and produced by her 22-year-old brother Finneas O’Connell, whom she credits and affectionately introduces to concert ...

Who is Finneas? 7 things to know about Billie Eilish's Grammy-winning brother Finneas O'Connell made Grammys history of his own on Sunday alongside sister Billie Eilish.

Finneas O’Connell, best known for his work as a producer for his sister Billie Eilish, said that he was tear-gassed during a “peaceful protest” in Los Angeles over the weekend.

Finneas O'Connell, left, and Billie Eilish pose in the press room with the award for best original song for "What Was I Made For?" from "Barbie" at the Oscars on Sunday, March 10, 2024, at the Dolby ...

Finneas O’Connell, best known for his work as a producer for his sister Billie Eilish, said that he was tear-gassed during a “peaceful protest” in Los Angeles over the weekend.

Finneas O’Connell, best known for his work as a producer for his sister Billie Eilish, said that he was tear-gassed during a “peaceful protest” in Los Angeles over the weekend.

Finneas O'Connell, left, and Billie Eilish pose in the press room with the award for best original song for "What Was I Made For?" from "Barbie" at the Oscars on Sunday, March 10, 2024, at the Dolby ...

Finneas O’Connell, best known for his work as a producer for his sister Billie Eilish, said that he was tear-gassed during a “peaceful protest” in Los Angeles over the weekend.

Finneas O’Connell, best known for his work as a producer for his sister Billie Eilish, said that he was tear-gassed during a “peaceful protest” in Los Angeles over the weekend.

Finneas O’Connell, best known for his work as a producer for his sister Billie Eilish, said that he was tear-gassed during a “peaceful protest” in Los Angeles over the weekend.