Ledger most recently earned Oscar Golden Globe, BAFTA and SAG Award nominations and won the New York Film Critics Circle Award for Best Actor for his portrayal of Ennis Del Mar in the award-winning drama Brokeback Mountain. His other credits include Casanova, Monster's Ball, Lords of Dogtown, The Brothers Grimm and The Patriot.
"Chris' unique vision is what made 'Batman Begins' such an outstanding film and we could not imagine anyone else at the helm of 'The Dark Knight,'" said Robinov. "We also can't wait to see two such formidable actors as Christian and Heath face off with each other as Batman and The Joker."
"I'm excited to continue the story we started with 'Batman Begins,'" added Nolan. "Our challenge in casting The Joker was to find an actor who is not just extraordinarily talented but fearless. Watching Heath Ledger's interpretation of this iconic character taking on Christian Bale's Batman is going to be incredible."