People are worried about the degree to which corporate interest is starting to threaten human interest.

You're always choosing the start point and the end point. And almost by definition, the most interesting period is where something happens, as a result of which something is different at the end. And so to me, the idea that you know everything about a character at the beginning is sort of ridiculous. Something has to be revealed. I like it when the deeper you go with the character, the more you see the layers start to peel away. It's more challenging to me, but it's also just interesting. Those are the things I like to watch. I like to watch the evolutions of something.

What we set out to do with this movie [Leaves of Grass] was to create something that was funny and serious and had large tonal ambitions. A movie that could be poignant and funny, and suddenly quite violent. To have a character utterly sideswiped, and to learn that life is about balance.

I think technology is having a democratising effect on film.

When I was very small, I had that first-time-you-see-a-play experience, which immediately made me want to act, because it seemed like this incredible outlet for something I was already doing fairly compulsively anyway, which was putting on hats and costumes and doing funny voices. It was a very natural compulsion for me.

When you have a pipe salesman with a business called Macabee Pipes, I'd say you've got your tongue planted firmly in your cheek.

Most of the movies that I've made that I really felt good about and cared about made very little money anyway, so I'm not particularly worried about people downloading and sharing them.