Robert Pattinson and costar Sarah Gadon made the first of many promotional appearances in Cannes today to chat up their David Cronenberg-directed project, Cosmopolis. Rob's movie is in competition against Kristen Stewart's latest dramatic endeavor, On the Road. Kristen's film premiered last night and even though she didn't walk the carpet with Rob, he was still on hand to support her groundbreaking performance. Kristen and Rob shared some PDA at the afterparty, where the duo were spotted cuddling and kissing. Kristen's reportedly still in Cannes so we'll have to wait and see if she joins Rob tomorrow for his big premiere.