Batman - Heath Ledger's Joker Diary

From youtube

Extract from the documentary "Too Young To Die". Kim Ledger, his father, speaks.

TRANSLATION

"This is the Joker's diary.

In order to inhabit his character, he (Heath) 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.'