When I can't immediately define the character, and there's an element of mystery to it and still a lot to be explored, that's when I say yes.

When I was very young, biology, the diversity of life, was one of my main interests. I know there's this image people have that I'm this spoiled, cocky punk of an actor. Honestly, that's not who I am. I really care that so many species have been wiped out, like genocide of entire races. I believe in the divine right of all species to survive on this planet. So I decided I want to be active as an environmentalist. I learned. I asked experts. I got active.

I don't think my parents would be shocked about anything I did, because they're so laid-back.

I'm shy, but when the time comes to be wild, I'm fun-loving, adventurous, and mysterious.

I've always kind of made sure to maintain the sense of who I am and never be mean or cruel or snotty to anyone. Because, at the end of the day, it's not going to help you last in the business, and who wants to be around someone like that? I don't want to turn into 'that guy.' That guy!

I didn't worry about what DeNiro thought... I went in, looked him in the eye, and got the part. I was confident, even though I'd never done anything like it before. Now I realise it was ignorant confidence-I had no idea.

It's a tough thing-you get in a situation where you feel you have to be perfect all the time and it sucks.