I don't worry. I'm more stoical. Of course I have insecurities. I fear getting older. I fear death and illness. I'm not prone to depression, but I get depressed because everybody gets depressed. Suddenly I'm away from my family or doing a job I'm not enjoying.
I keep myself content by doing lots of different stuff and make sure that my next role is completely different to the last. I just enjoy the versatility of it, the challenge of doing lots of different things. It keeps the job interesting.
I had such a nice time making it, and I can't wait to make the fifth one. The whole crew were just really, really lovely. All the costume people, the make-up girls, the kids - even my driver.
The very best thing about doing it is seeing the reaction on kid's faces when you tell them you've done it.
When you do something well, this is the best job in the world.