I sat around in a hotel room in London for about a month, locked myself away, formed a little diary and experimented with voices - it was important to try to find a somewhat iconic voice and laugh. I ended up landing more in the realm of a psychopath - someone with very little to no conscience towards his acts.
Heath LedgerIt's like anything in life, visualizing the old man you're going to become: As long as you have a clear picture of that - the life you want to lead - eventually you'll probably get there.
Heath LedgerYou have to be willing to be manipulated in the first place because you can either recognize that in your director and then fight it because you don't trust them, but I'm not going to let them manipulate me. Or you think they're on to something and that they're manipulating something out of you which is interesting and new.
Heath Ledger