Joaquin Phoenix and Rooney Mara have come on board as executive producers of "I'm Glad You're Dead Now," which won Cannes Film Festival's short film Palme d'Or this year. Palestinian Tawfeek Barhom directed, wrote and co-stars in the 13-minute drama, which is a co-production between Palestine, France and Greece. The film also stars Ashraf Barhom. [...]