Some, like Heath Ledger, had a lot of psychological prep to do in order to make convincing psycho killers, sociopaths and other similar deeply disturbed characters.
Ledger said he distanced himself from the outside world, locked himself away in a hotel room in London for a month to find an iconic voice and laugh for Joker. Ledger also dug deep into the realm of a psychopath to learn as many things as possible about people with no conscience who kill in cold blood.
Click here to buy “The Dark Knight” (Blu-ray) on Amazon
Ledger’s father commented that his son always took his time to prepare for roles, but this time he really “took it up a notch”. The final product, or Ledger’s legendary Joker, speaks volumes on the time and effort the late actor invested in the part.