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Karl Wiedergott (born Karl Aloysious Treaton; February 8, 1969) is a German-born American actor. He is noted for his voice work on the sitcom The Simpsons from 1998 to 2010, voicing background characters and some celebrities such as John Travolta and Bill Clinton. Wiedergott provided various voices on more than 200 episodes, his final appearance being in the season 22 episode "Donnie Fatso". Wikipedia