The Nolan brothers were mainly inspired by Batman: The Killing Joke.

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The Joker was previously portrayed by Jack Nicholson.

Ledger said that playing the Joker was 'physically and mentally draining.' 😪

Starred in Nolan's film 'The Dark Knight.' 🎬

Heath Ledger secluded himself for six weeks to prepare for playing Joker! 🃏

Heath Ledger on his time playing the Joker. 🤍👏

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