It takes such a particular amazing and extraordinary type of personality to become an actor. I love them. You can't do my job without them. I've worked with a lot of film actors and most of them are so, so prepared in their approach because they are used to turning up ready to shoot: you have to have your performance, you have to have your lines, you have to have everything pretty much decided and ready to go whenever everyone else is ready.

The camera kind of finds things that the naked eye can't even see. By moving in a certain way, you're already telling part of the story.

When you're casting, you have to do quite a bit of research. But I always think you have to do it with a pinch of salt with actors, because it's so unfair to pigeonhole them and so often they are. I try to be as open as possible and if people are really interested and really want to have a go, then let's get them in and see them.

I don't have a particular genre that I want to stick to; if you work on a small piece, you take that experience with you when you work on a big piece and vice versa. You will take those experiences with you and they will make the next one richer.

I love working with people I've worked with before and that can be true of when people have worked together. But if two people have a natural chemistry and it just works, to be there for the first time, particularly on a story where it's about these two people meeting for the first time, that goes a long way.

I ran the Gate in Notting Hill for a while, which is where Stephen Daldry started out. Those theaters are magical, because there's no money, so in a way there're no boundaries and it allows you to be inventive and brave and take risks and all those important things while you're starting out.

If you cast your supporting cast well, it should be seamless. You shouldn't even notice who's a big part and who's a small part. A good cast enriches everything.