Heath Ledger, The Dark Knight Rises
In order to prepare for the role of “The Joker” in the movie Batman — The Dark Knight Rises, Heath Ledger immersed himself into the madness of the Joker by locking himself up in a hotel room for around a month. He portrayed the Joker’s psychological instabilities by making a diary entry for the role. He also worked on adjusting his voice and laughter to create a more psychotic resemblance.