Disney/Pixar's Up will have its world premiere as the opening film of the 62nd Cannes Film Festival on May 13, becoming the first animated film as well as the first 3D film ever to open the celebrated festival, organizers announced today (Thursday). It is due to be released in the U.S. on May 29th. While other animated films have been featured in and out of competition at Cannes over the years, the French black-and-white film Persepolis is the only one ever to have won a prize, taking the Jury Award in 2007. While in making its announcement the festival listed nine other animated films that had been included in its Official Selection in the past, it oddly made no mention of Persepolis , a film about an Iranian girl growing up during the Islamic revolution. Like Up, Persepolis was to have had the prestigious spot as the opening film at the Bangkok Film Festival in 2007 but was yanked following protests by Iranian diplomats in the Thai capital.