M83 have announced that they have composed the music for the upcoming French thriller Knife + Heart (Un couteau dans le coeur). The film is directed by Yann Gonzalez and stars Vanessa Paradis, Kate Moran and Nicolas Maury. The movie is set in 1970s Paris and follows a porn producer who decides to make a more ambitious film. Charles Gillibert (On the Road, Clouds of Sils Maria, Mustang) is producing the project.