The Thief and the Cobbler was directed by Richard Williams. At more than 30 years, it holds the record for the longest production time for a motion picture - much of it spent in Development Hell. Also goes under the titles The Princess and the Cobbler and Arabian Knight, depending on which version you’re watching. Often considered one of the lost treasures of animation (some critics consider it the greatest unfinished film of all time) the movie began as a pet project which Williams and a few colleagues worked on out of his garage. It was picked up by a studio after Williams won an Oscar for Roger Rabbit, but funding was pulled with just a few months left to go in production. Williams is an incredibly meticulous animator so his work takes a really, really long time to produce, even by animation standards. This amazing attention to detail really shows in the film; but it may also be what doomed it to incomplete status.