Heath Ledger turned up, did that, and now every comic book villain is just trying to keep up.
Fun fact: "Heath Ledger locked himself in a hotel room for six weeks to develop the Joker's voice and mannerisms."
Al Pacino snorts half of Miami and shoots the other half, and somehow it became the most quoted film in hip-hop.
Fun fact: The mountain of fake cocaine on set was actually powdered baby laxative, and Pacino said it gave him a genuine sore nose.