Caine explained that once hair and makeup were complete, Ledger's take on the Joker was "chilling" to see. "The smeared makeup, the weird hair, the strange voice. It was chilling.

Michael Caine writes in his new memoir, “Don't Look Back, You'll Trip Over: My Guide to Life,” that he was actually “terrified” of Heath Ledger on the set of Christopher Nolan’s “The Dark Knight” (via NME).

In his memoir, Michael Caine recalls Heath Ledger's incredible transformation into the Joker in 'The Dark Knight', which left the cast in awe and raised their performances. Ledger, who posthumously won the Oscar for Best Supporting Actor,