Nicolas Cage in Captain Corelli's Mandolin. I have never seen my wife so mad. She adored the book and he singlehandedly ruined it for her.
Never read the book, didn't care, but she was right, he was awful in that movie.
So infuriating! I was so deeply annoyed at the casting I never saw the movie, so thank you for taking one for the team in order to report back to a curious redditor all these years later