I'm always really worried about ruining their lives. Especially with people that aren't famous. It's such a massive change. I'm kind of a paranoid wreck. I've eaten a lot of room service.

It's a strange place where the film industry is at. I guess you could just play superhero after superhero. That seems to be the only guaranteed big-money thing. I don't know.

One of the interesting things about having an international fanbase is that every single country has a different reaction to you and to the movie.

I was quite intimidated by Ralph Fiennes. I didn't really talk to him while I was doing Harry Potter and the Goblet of Fire and the only thing I did with him was when he stepped on my head. Then I went to this play and he was there. And this girl said, “you've worked with Ralph Fiennes haven't you, Robert?” and I was like, “well, no...” and Ralph said, “yes, I stepped on your head.” And that was the extent of our conversation.

You can make five massive hits in a row and still not get cast by the directors who you want to work with doing little movies.

Start drinking vodka instead of beer, and try to get a six-pack as early as possible and you'll be a much more successful actor.

I hope there is such a thing. I guess it would be quite scary to find a soul mate when you're young because you're probably going to mess it up.