During the press rounds for DUE DATE, Robert Downey Jr. slipped on a secret role for his co-star Zach Galifianakis.
During the press rounds for DUE DATE, Robert Downey Jr. slipped on a secret role for his co-star Zach Galifianakis. E! Online got the scoop that the hot comic will be in the untitled Muppet movie. Galifianakis kept quiet about the details though.