Wallace Shawn (born November 12, 1943) is an American actor, voice actor, playwright, essayist and comedian. His film roles have included Wally Shawn in My Dinner with Andre, Vizzini in The Princess Bride, Mr. Hall in Clueless and Rex in the Toy Story franchise. He has also appeared in a variety of television series, including recurring roles as Cyrus Rose in Gossip Girl and as Grand Nagus Zek in Star Trek: Deep Space Nine. His plays include The Designated Mourner, Aunt Dan and Lemon and Grasses of a Thousand Colors. He also co-wrote the scr…