Celebrity
Heath Ledger was a pleasant surprise to many thanks to his starring role as the Joker in 'The Dark Knight.' The actor put in an unforgettable performance as Batman's arch-nemesis, winning a posthumous Oscar as a result after his death. However, there were some very real doubts Ledger and director Christopher Nolan had about Ledger's portrayal in the beginning, as they weren't sure his Joker voice was any good.