Actors Who Went Crazy From Their Film Roles

Robert De Niro - Cape Fear

Michelle Williams - My Week with Marilyn

Michelle Wiliams was given the tough role of playing icon, Marilyn Monroe, in the film Marilyn. To get her role down perfectly, Williams tied a belt around her legs so that she could get Marilyn's famous walk down.

 After spending weeks studying up on how to become Marilyn entirely, Williams admitted that she wasn't sure if it was her in her head or if the feeling of being Monroe had completely taken over. Shia LaBeouf-Fury

Shia LaBeouf - Fury

Shia LaBeouf wanted to keep his character as realistic as possible when shooting Fury, so he cut himself up (in real life) and he kept his wound completely open the whole time the movie was being shot. 

The cut on his cheek was done by himself, and he followed this up by pulling out one of teeth. To add to the insanity, he didn't bathe for 30 days straight. The crew couldn't handle the smell, so they actually arranged a separate room for Shia to go to after the shoots.

Anne Hathaway - Les Miserables

The Devil Wears Prada actress, Anne Hathaway, was a very far character away from her fashion assistant role when she was cast to star in Les Miserables. She put on an incredible performance for the movie, but she became obsessed with her role.  

 She shaved her head for her character and she dropped 10 kilos after eating nothing but oatmeal paste for weeks. Since Fantine went through a lot of hardships, Hathaway claimed that she was physically and psychologically deprived when taking on the character for the film.