Mel Brooks
From Muppet Wiki
Mel Brooks (b. 1926) is a comic writer, director, and actor who made a cameo appearance in The Muppet Movie as Professor Krassman. He also made a vocal cameo in It's a Very Merry Muppet Christmas Movie as the voice of the narrator Joe Snow.
He made a very brief appearance in the 1979 special The Muppets Go Hollywood. In 2005, Jim Henson's Creature Shop provided animal effects for the film version of Brooks' musical The Producers, in which Brooks appeared as himself (in addition to supplying animal sounds).
