Whenever you deal with science fiction you are setting up a world of rules. I think you work hard to establish the rules. And you also have to work even harder to maintain those rules, and within that find excitement and unpredictability and all that stuff.

Everything is a learning process: any time you fall over, it's just teaching you to stand up the next time.

To act with a tennis ball and imagine it's a tentacle, or if you're in some kind of wilderness film and you go, 'Okay, we can't have a grizzly bear here, but imagine when you step over the rock there there's a grizzly bear.' I don't know. They're tough moments.

Whenever you deal with science fiction you are setting up a world of rules. I think you work hard to establish the rules. And you also have to work even harder to maintain those rules, and within that find excitement and unpredictability and all that stuff.

The tricky thing becomes: Do you know yourself well enough to then portray that on screen? And for me, I find that really hard. I'd rather hide behind accents and funny walks.

I'm on the list that I thought I'd never be on. I'm not sitting here thinking, 'God, I might get this part' or 'is it too late for me to play Hamlet?' It's really about: who do I get to work with? There's so many people on that list.

I'm not going to allow myself to second-guess projects. I'm just going to do the ones that I fully love and believe in - that's a real privilege.