I want to be challenged, I want to keep challenging myself - whether or not it's changing yourself physically or just pushing yourself to a certain extreme. I get bored quite easily so I like to keep my mind entertained by challenging myself.

As a kid, I used to run around our garden waving a stick and pretending to be a million different people. That's why I became an actor, really.

Some people can very easily switch off and be guilt free, not that what I'm doing is about guilt, but they can completely disconnect and not care because it doesn't affect them. I've always really cared about what happens and felt a certain responsibility.

Nothing's been changed overnight. It's like watching your cat grow: you see it every day, so you don't really see it change, you wake up one day and it's a bloody great thing. Your friends come round who you haven't seen for a couple months and they're like, "Oh my god, your cat's grown so much again." And I'm like, "Has it?" But when you're living it... I just find that my life has subtly changed bit by bit, so I don't ever really notice it too much.

I want to be challenged, I want to keep challenging myself - whether or not it's changing yourself physically or just pushing yourself to a certain extreme. I get bored quite easily so I like to keep my mind entertained by challenging myself.

I was lucky enough to get a very good agent at the age of 15, and got my first film when I was 16, so it's been rolling on since then.

Travel is best when it's as unplanned as possible so that you get that real sense of adventure. The film 'Thelma and Louise' really encapsulates that - their travels are unplanned and spontaneous and therefore full of excitement, escapism and optimism.