A Separation is another film that I think is extraordinary, and one of those things that feels like it's from another planet, much like Terrence Malick's movies did: at a certain point, you feel like he's an alien from another planet telling us and looking at us and showing us how we are. I also really, really love Jerry McGuire.

Dad, I may not be the best, but I come to believe that I got it in me to be somebody in this world. And it's not because I'm so different from you either. It's because I'm the same. I mean, I can be just as hard-headed, and just as tough. I only hope I can be as good a man as you.

I started to realize I love study, I love the study of human behavior.

I always find you go back to an animal; it will always show you the sort of primal aspects of behavior. You always know how to respond if you choose that.

My mum raised us on classic movies and a lot of musical theatre.

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...

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.