Wallace Michael Shawn is an American actor, voice actor, playwright, essayist and comedian. His film roles have included those of Wally Shawn in the Louis Malle-directed comedy-drama My Dinner with Andre , Vizzini in The Princess Bride , Ezra in The Haunted Mansion, providing the voice of Rex in the Toy Story franchise, providing the voice of Gilbert Huph in The Incredibles , and providing the voice of Calico in Cats & Dogs: The Revenge of Kitty Galore . He also starred in a variety of television series, including Gossip Girl and recurring appearances 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 screenplay for My Dinner with Andre with Andre Gregory, and he scripted Vanya on 42nd Street, a film adaptation of Anton Chekov's play Uncle Vanya. His book Essays was published in 2009 by Haymarket Books. His latest film from June 2014 was A Master Builder based on the play by Henrik Ibsen.