Michael Caine was ‘terrified’ by Heath Ledger's Joker transformation

Michael Caine reflected on working with the late Heath Ledger during the filming of the 2008 film "The Dark Knight."

In his new memoir, "Don't Look Back, You'll Trip Over," the 92-year-old actor recalled how he was initially skeptical about Ledger's casting as Batman's classic nemesis The Joker, only to be later blown away by the "Brokeback Mountain" star's performance.

"He was a lovely guy, very gentle and unassuming," Caine wrote of Ledger, via Entertainment Weekly. "I wondered how he was going to play the Joker...