As Uta Hagen would say, there's the representational actor and the presentational actor. My sister [Maggie Gyllenhaal] came up to me recently after she saw this movie, Southpaw, the movie I did, and she thought there was this exploration of that type of presentation, and a bit of representation as well, if I could be totally honest, where she was deeply moved.

It's daunting trying to do any service as an American to such a beautiful, fluid speech pattern that you [British] all have. We are just barbarians in comparison.

My mom would always say this thing about writing - and I've taken it into account in a lot of things in my life - which is just, "Make it shorter." Figure out what you are truly saying, whittle it down to the essence, then say that.

Really, contrary to popular belief, I like to have a good time and not take myself too seriously.

By cool, I don't mean cool. I mean vulnerable and a mess.

Heath [Ledger] would walk up to a horse and could like silence the horse. Just literally he'd be like, 'Shh. Shh.' And then he'd get on the horse. I'd be like, 'I'm going to get on you.' They'd be like, 'F - off!' I didn't really have that style.

I'm always nervous about it. You know, somehow, without even knowing it, I try and recreate the idea of what it feels like to go in front of an audience every night when I'm making a film. And that similar type of pressure and excitement before a scene, or preparing for a movie, so...