Well, all these stars have their houses swept quite regularly by people who work in the surveillance security business. They come in and they look for bugs and things.

There's almost a fear that if you understood too deeply the way you arrived at choices, you could become self-conscious. In any case, many ideas which are full of personal meaning seem rather banal when you put words to them.

When I began making films, they were just movies: 'What's the new movie? What are you doing?' Now they're called 'adult dramas.'

It was immediately apparent that it was full of tricky ingredients to balance. In fact, I found it very intriguing. What held me back from saying yes to the producer was that I wasn't sure who could play Truman.

Well, there's that girl on the Internet - although this isn't an example of someone who doesn't know they're on - but there's a girl on the Internet who posts one photograph every two minutes from her bedroom.

Normally as a director, you do look at other films and things that are relevant. But with this film, it became impossible because I became so aware of the camera placement.