Donald Lake (born November 26, 1956) is a Canadian actor, film and television writer, and television producer. He is frequently cast by director Christopher Guest, and is also a close friend and the collaborative partner of Bonnie Hunt. He had a role in The Bonnie Hunt Show, for which he received comedic praise. He also had roles in the comedy films Police Academy, Hot Shots!, Dumb & Dumber To, and Corner Gas: The Movie. He played more serious roles in Terminator 2: Judgment Day and Super Mario Bros., along with a voice role as Stu Hopps in Zootopia. He is also known as Dr. Carl Whitehorn on The Fresh Prince of Bel-Air.