Co-Star Michael Fassbender is a 'No-Show,' But the Band Played On Kneecap biopic, co-starring the three Irish rappers Mo Chara, Móglaí Bap, and DJ Próvaí, and actor Michael Fassbender, premiered at the Sundance Film Festival Thursday night. Director Rich Peppiatt says it's the first Irish-language feature to play Sundance. The film documents how this anarchic Belfast trio became unlikely figureheads of a civil rights movement to save their mother language and forever changed the sound of Irish music. The film, acquired by Sony Pictures Classics, will be released in North America and other major markets around the world.