Joel David Katz, professionally known as Joel Grey (b. 1932) is an American actor, singer and dancer, who guest starred on The Muppet Show episode 103.
He won Broadway's 1967 Tony Award as Best Supporting or Featured Actor (Musical) for Cabaret, and later won the 1972 Best Supporting Actor Academy Award for the same role in the film version of Cabaret. Grey is one of only eight actors to have won both a Tony and an Oscar for having portrayed the same role on stage and screen.
Grey later played Amos Hart in the Broadway revival of Chicago, where he sang "Mr. Cellophane," a song used in the Ben Vereen episode of The Muppet Show.
He is the father of actress Jennifer Grey, star of Dirty Dancing.