Wallace Michael Shawn (born November 12, 1943), sometimes credited as Wally Shawn, is an American stand-up comedian, actor, writer, author, voice artist, and intellectual. His best-known film roles include Vizzini in The Princess Bride (1987), Rex the toy dinosaur in the Toy Story films, and debate teacher Mr. Hall in Clueless (1995).
On Nickelodeon, he was the voice of Taotie in Kung Fu Panda: Legends of Awesomeness.