Patrick Stewart has joined the cast of "Blue Ruin" director Jeremy Saulnier's feature "Green Room" for Broad Green Pictures and filmscience. The story follows the members of a punk band who fight for survival against a white supremacist gang after they witness a horrific act of violence. "Star Trek" and "X-Men" star Stewart will play the leader of the supremacist organisation. Anton Yelchin, Imogen Poots, Alia Shawkat, Joe Cole, Callum Turner, Mark Webber, Kai Lennox, Eric Edelstein and Macon Blair also star.