Heath Ledger's performance in The Dark Knight quite simply changed the game. He raised the bar not just for actors in superhero films, but young actors everywhere; for me. His performance was dark, anarchic, dizzying, free, and totally, thrillingly, dangerous.

I learn the lines as soon as I can and then the challenge really, for filming, is to show up and be there and respond to what's around you. That's where the gold dust is. It's really strange, no amount of preparation will help you with the magic of spontaneity on the day [of filming].

Fame is weird and amorphous and unpredictable.

I've always loved King Kong. He's like a modern-day myth, an icon of the cinema.

I would always play the baddie, incidentally.

Nurture your own confidence and make it real; don't pretend to be someone you're not.

Having seen what I've seen in South Sudan, there's no way I can't talk about it.