When Valentine Cawley's three young sons (who are also actors) watched his performance as the Witch Doctor, not a one of them recognized the voice of their own dad, because he had invented a new voice just for the role.
Sean Astin voiced Ribbit. His real-life daughter Ali Astin voiced The Princess.
Ribbit wants to change his name to "Norman", a nod to Executive Producer Norman Abdul Halim (who also originally came up with the story concept).
Sean Astin and Tim Curry appeared in The Color of Magic (2008).