Wallace Shawn is an American character actor, voice artist, playwright and essayist. His film roles have included those of Wally Shawn (a fictionalized version of himself) in the Louis Malle directed comedy-drama My Dinner with Andre (1981), John Lahr in Prick Up Your Ears (1987), Vizzini in The Princess Bride (1987), Mr. James Hall in Clueless (1995) and providing the voice of Rex in the Toy Story franchise. He also plays Dr. John Sturgis on the television series Young Sheldon. He has previously appeared in a variety of television series, including recurring roles as Grand Nagus Zek in Star Trek: Deep Space Nine, as Manny in the game Kings Quest (1993–1999) and Cyrus Rose in Gossip Girl (2008–2012).

He voices Unkar the Unfortunate in the Tales of Arcadia universe.

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