Kristen Stewart is not welcome at Robert Pattinson’s August 13 New York City premiere of Cosmopolis. According to Radar Online, security has been told to keep the Twilight star, who admitted to hooking up with her Snow White and The Huntsman director Rupert Sanders, away from the red carpet and after-party of Pattinson’s first scheduled public appearance. “The decision was made because Robert just doesn’t want to see her. There were fears that she could use it as a chance to talk to him in person and that sort of drama is not wanted at the premiere,” the New York Post quoted a source as telling the website. “There’s also the fact that if she did attend, it would distract from the film premiere itself and the movie bosses are not interested in that sort of publicity,” the source said. Meanwhile, People magazine reported that Pattinson is “heartbroken and angry, and sources tell the magazine that he’s been drinking and relying on friends to deal with the pain.”