It is really hard when the actor you pictured can't do the film.

I'm fascinated by what makes up a self, how one becomes a self, how much is it an answer to others and how much is it an essence of self. We learn how to be people from other people. Then you think - what's personal freedom? Is self-creation possible? This book is dedicated to a friend of mine who really did re-create herself. I didn't do that - I stayed in the circus and am a circus performer like my parents were. I did what I was raised to do - I'm glad I did but I'm fascinated by the people who managed to do something else. I was always very curious about other people.

In a way, a lot of my work is in the re-writing once it is cast, as I adapt to the rhythms of how the roles are played out by the actors.

Every milieu has something ridiculous about it - film-making, the music world, painting - because people who take themselves seriously become funny pretty quickly.

I was trained to look at colour, edges, to see negative space. I honestly think my greatest influence as a writer is from Cubism - the idea of a multi-faceted, multi-perspective way of looking at things.

I think one of the great joys of being a writer is you can transcend everything, even your own sex, what century you live in, and how you think. I found it quite natural to think as a male because I actually think that as a female, one often thinks in the mind of a male in terms of eroticism. You think about what the other person feels. So it's not that hard to imagine being that person.

Writing is acting in the sense that you're imagining and inhabiting another. In the book I was trying to get at the root of what true acting is.