Natalia Tena

Whenever I start a 'Potter' film, I get these dreams. The last dream I had, I was in a war and the sky was blotted with broomsticks and I couldn't find my wand. It was so intense. I always have mental, intense, war wizard dreams when I'm doing the films.

For a long time, I would go out of my way to have a personal appearance on the verge of an insane person, because it was closer to how I felt, but I looked so dumb. So, I just stopped. It was like, 'I'm just going to look like a banker.'

When I have a creative insight, there is a high. I think back in the day, I made music as much as I did because it made me feel so good. I think you could argue that there is a creative addiction - but, you know, the healthy kind.