I don't really understand it even now, It does have an angle which is attached to something quite primal in girls. I guess people want it to define them, like 'I'm a Twilight fan.' That's crazy to me. I think people really just like being part of a crowd. There's something just tremendously exciting about hyping yourself up to that level.

I haven't really decided to be an actor yet! I started doing plays when I was about 15 or 16. I only did it because my dad saw a bunch of pretty girls in a restaurant and he asked them where they came from and they said drama group. He said, 'Son, that is where you need to go.

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.

It's strange because I'm a sex symbol to 14-year-old girls which I guess is not the most helpful situation to be in. But yeah, I've never really thought of it. It's just so funny. I mean, just last year I couldn't even get a date and then this year, the world turns and it's so bizarre that everybody just changes their mind at the same time.

It's insane. I've had girls throwing themselves at me since the hype started. Now the film's out I can't walk down the street without being pounced on. All my life I've hated crowds. Now I only have to step outdoors and I'm at the centre of one. It's very cool but it's very uncomfortable too.

If you find a girl who reads, keep her close. When you find her up at 2 AM clutching a book to her chest and weeping, make her a cup of tea (coffee) and hold her. You may lose her for a couple of hours but she will always come back to you. She'll talk as if the characters in the book are real, because for a while, they always are. Date a girl who reads because you deserve it. You deserve a girl who can give you the most colorful life imaginable.

I put a flower in someone's locker when I was 15 years old. This girl, called Maria. Maybe I was 14. She actually thought it was from someone else, and the other guy claimed it as well, which was just great.