10 People You Completely Forgot Were In Harry Potter Movies

10. John Cleese

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John Cleese is best known for his long tenure on the British comedy series “Monty Python.” Even some of the most ardent “Harry Potter” fans are unaware that the comedian also had a small role in the films. Cleese appeared in both “Harry Potter and the Sorcerer’s Stone” and “Harry Potter and the Chamber of Secrets” as Nearly Headless Nick, the Ghost of Gryffindor Tower.