Heath Ledgers diary from The Dark Knight is revealed in a new German documentary called "Too Young To Die." The diary shows Ledgers twisted thoughts before his death. Heath's diary reveals how he was rapidly morphing into the joker, his "Dark Knight" character.

Heath Ledgers was just 28 when he was found unresponsive in His New York home in January 2008. While Heath's death was ruled accidental the diary does reveal he was struggling with the deeply twisted Dark Knight role and his own emotions as the joker.

His father, Kim Ledger, talks about the joker diary in the documentary.

"He pretty well locked himself up in a hotel room for weeks," Kim told the filmmakers.

"He galvanized the upcoming character. That was typical of Heath. He would do that. He liked to dive into his characters, but this time he really took it up a notch."

In addition, the actor wrote out the famous hospital scene in which he confronts Harvey Dent in a nurse's outfit.

"The hospital scene is interesting because when he was a kid, his sister Kate liked to dress him up as a nurse," Kim said. "He looked pretty funny like that. He looked pretty funny in the film, too."

On the last page, Ledger scrawled "Bye Bye".

"At the end of shooting, he wrote goodbye on the back of the last page. It was hard to read that," his father said.

"I sat around in a hotel room in London for about a month, locked myself away, formed a little diary and experimented with voices - it was important to try to find a somewhat iconic voice and laugh. 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."

He's dedication to the clown character would also be his ultimate demise.

There's a French translation over the entire thing so we've included the transcription after the jump:

"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.'