Karl Wiedergott
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Karl Wiedergott has regularly played various voice roles in the television program The Simpsons, beginning in 1998. His roles have included Bill Clinton and Don Rickles. However, he doesn't play any main characters. He attended Bridgewater State College in 1984. Sometimes he doesn't voice any characters, but is still credited anyway in the credits (a similar incident occurred when Marge didn't speak in Krusty Gets Kancelled.)