While prepping for The Dark Knight, Heath Ledger holed up in a London hotel for a month, creating a scrapbook while immersing himself into the Joker character. We now get a peek at it.
(This video has a French dub. Its English translation, via a YouTube comment: "“This is the Joker’s diary. In order to inhabit his character, he locked himself up in a hotel room for weeks. He would do that. He liked to dive into his characters, but this time he really took it up a notch. The hospital scene is interesting because when he was a kid, his sister Kate liked to dress him up as a nurse. He was really funny like that. He also was in the movie. This is a make-up test which was done eight months before. Before the end of the shooting he wrote ‘bye bye’ on the back of the page. It was hard to see this.”)