Heath Ledger's diary during one of his final films – the Joker, has been revealed in a new video clip. A teaser for a new documentary spotlighting Ledger's life and career shows a scrapbook-like journal created by Ledger during his time filming the Joker. 

Ledger's father shows the diary, saying that it was "certainly typical of Heath to immerse himself in the upcoming character." Before noting "I think this was just a whole new level..." Take a look at the clip above and stay tuned for more news on the documentary titled Too Young to Die, coming to Buro 24/7 Middle East soon...