The When in Rome star has stepped behind the camera to make mockumentary Brother's Justice, which chronicles his own desperate attempts to become a martial arts star.
The movie features Kutcher and Shepard's pals Tom Arnold and Bradley Cooper.
The plot summary reads, "Together, they fight to realise Dax's true passion while facing rejection at every turn. With maniacal conviction, Dax journeys on a bizarre path that becomes increasingly nonsensical and destructive, all at the expense and exploitation of his personal and professional relationships."
Brother's Justice will be screened as part of this weekend's (22-24Oct10) Hollywood Film Festival in Los Angeles.