In preperation for his role as The Joker, Heath Ledger not only read the comics that went along with the script for The Dark Knight, but also locked himself away in a hotel in London where he formed a little diary and experimented with voices.
Here is what went on in that diary:
Jesters, clowns and jokers appear among the images in the diary, as do pictures of actor Malcolm McDowell as Alex in A Clockwork Orange.
And, of course, images of THE Joker from the Batman comics.
The actor wrote out his lines for the hospital scene by hand in the diary.
The Make-Up Test
"I ended up landing more in the realm of a psychopath — someone with very little to no conscience towards his acts. He’s just an absolute sociopath, a cold-blooded, mass-murdering clown."