Malayalam actor Roshan Mathew has joined the cast of filmmaker Anurag Kashyap's upcoming film. "[Anurag] said that he has a script for a film that he's planning to do, and asked me...whether I'm interested in it. It was as simple as that," Mathew said. The actor features in the upcoming bilingual film 'Moothon', which has been co-produced by Anurag.