Jonah Hill has joined the cast of Joaquin Phoenix?s new movie, ?Don?t Worry, He Won?t Get Far on Foot.? The movie is being directed by Gus Van Sant, and it is about a cartoonist named John Callahan. Callahan cartoons were known to be controversial and he himself is quadriplegic. Callahan became a cartoonist after he lost his ability to walk from a car accident when he was 21. The film is being produced by Iconoclast Pictures and Anonymous Content.