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Günter Meisner (18 April 1926 – 5 December 1994) was a German film and television character actor. He is remembered for his several cinematic portrayals of Adolf Hitler and for his role as Arthur Slugworth / Mr. Wilkinson in Willy Wonka & the Chocolate Factory. He was fluent in four languages (German, French, Italian & English) and appeared in many English-language, German-language and French-language films. Wikipedia