RESERVOIR DOGS star Michael Madsen has been forbidden to promote his new movie Scary Movie 4, because producers fear any talk about his character will ruin the film.

The actor reveals he has a confidentiality agreement signed with movie bosses at Miramax, which threatens him with legal action if he talks about his latest film part.

Madsen tells movie news website, "It's something nobody's ever seen me do before but I can't say who I'm playing."