Billie Eilish & Finneas

19.588 - 42.547 Terry Gross

This is Fresh Air. I'm Terry Gross. My guests are Billie Eilish and Phineas O'Connell. As you probably know, they're siblings who write songs together. She sings on their albums. He produces and plays several instruments. They've been writing and recording together since she was 13 and he was 18. Considering the number of records they've broken in the last few years, they're more than popular.