An agent friend of mine who will remain nameless said you can't make a romance about homeless people; nobody wants to see them kiss. And I thought, what a repulsive, repugnant, extraordinary thing to say. I had to think about the fact that the world is probably full of other people who feel like that. The very idea that we spend time trying to humanize humans is extraordinary to me.

The world is split into two kinds of people, those who would go out for a drink with John Lennon, and those who`'d choose Paul McCartney... After The Beatles came back from India, Lennon wrote "Happiness Is a Warm Gun" and McCartney wrote "Ob-La-Di, Ob-La-Da." End of argument.

I think when you're trying to produce a relationship on screen that doesn't actually exist, perhaps sometimes there's a temptation to look at each other more, to touch each other more...

Actors can be many things - vain, venal, self-serving, obnoxious, bullies - but all of the good ones are great storytellers. I wanted to watch what my actors were doing and how they were telling the story.

I was always waiting for the secret to be handed down to me. Ron Howard asked me what I was waiting for and I went, "Ron, I'm waiting to know the secret. I keep feeling there's some sort of secret that's going to passed on from a director." He went, "Oh no. There is none. You've just got to on and do it and make mistakes and figure it out."

When I became a father acting sort of took the place of what I did in my free time and my children became the main focus. I play a lot and my children play. Both my sons - my daughter's still too young really - have surpassed me with their music skills, which is wildly irritating.

I was born a Catholic and now I'm a lapsed Catholic. I'm something but I'm not a believer any more.