I worked with Steven Spielberg on 'AI,' and his level of preparation was extraordinary. He told me there was a time at the beginning when he was a bit more spontaneous and went over budget, and it absolutely wrecked his head. When you look at the power and assuredness of his movies, it makes sense that he works out so much in advance.

I don't plan in terms of career ambitions. The only career ambition I have is to work with people who are going to bring you up and elevate your performance. They'll let you know things that you didn't know already and bring you places that you might not have gotten to otherwise.

I find myself really privileged to be able to go in and look at a set that the likes of Hollywood can provide, and say, 'My God, look at the craftsmanship in this; look at the ambition in it, the scale of it.'

Winston was a bit of a challenge, all right, from a lot of different perspectives. It wasn't just the culture or the class divide or the historical baggage - it was also the age difference. We had to see if I could be aged-up legitimately, without it becoming some sort of hokey acting challenge.