Worlds are colliding!

Justin Timberlake plays a musician in his latest flick Inside Llewyn Davis. The film's new trailer shows JT and Carey Mulligan, his girlfriend in the movie, strumming a guitar in front of a crowd. Justin plays a sexy, scruffy folk singer in the film.

The movie, which is written and directed by Ethan and Joel Coen, follows a young folk singer (played by Oscar Issac) as he tries to break into New York's Greenwich Village music scene in the early 1960s.

Carey looks almost unrecognizable in the trailer with her dark brown locks. While she plays a folk musician in the film, her real life hubby Marcus Mumford does it for a living. Marcus even covers Jeff Buckley's hit "Fare Thee Well" for the trailer.

The film hits theaters on December 6. Justin's other flick Runner Runner, which also stars Ben Affleck, will be released on September 27. He also has that music thing he does on the side.