More and more has been slowly surfacing about the relatively unknown Justin Theroux since he started dating Jennifer Aniston (a story X17 broke in May.) Now, we've discovered that Theroux was the star of a sexed-up music video back in 2003!

The video, from Kate Hudson's fiance Matthew Bellamy's band, Muse, shows a shirtless Theroux as he watches prostitutes on film and trashes a hotel room. Yowza!

Muse's video isn't the first dark or sexy role for Theroux! He starred on Sex and the City twice, played a hitman in Charlie's Angels: Full Throttle, starred in American Psycho, played an evil DJ in Zoolander and much more.

Jen really picked a bad boy this time!