Rock On: Secret Celebrity Musicians!

Anne Hathaway! Halle Berry! Johnny Depp! See which Hollywood stars moonlight as musicians

KEANU REEVES

This low-key thespian has enjoyed success off-screen, thanks to his stint as a bassist for '90s grunge band Dogstar. The group scored gigs opening for Bon Jovi and Weezer, but broke up in 2002. Reeves still slaps the bass, though, and scored a second stint playing with the band Becky.