Co-director Peter Farrelly has revealed plans for a follow-up to the hit 1994 comedy about the cross-country adventures of two intellectually-challenged friends. But he insisted that the new film will be the first true sequel. He told ComingSoon.net: "We're getting set to shoot Dumb And Dumber 2 in September. It's the first sequel weâ??ve ever done and we've got Jim Carrey and Jeff Daniels back."