Jenna Fischer has signed on to star in the comedy, Walk Hard for Columbia Pictures.

She'll star opposite John C. Reilly in the film written by Jake Kasden and Judd Apatow; Kasden is directing. Fischer will play a June Carter Cash-like love interest for fictional troubled music legend Dewey Cox (Reilly); Fischer also will sing in a comedy custom-fit for Reilly, says Variety.

Walk Hard is set to start shooting early next month; a 2008 release has been scheduled.