I'm not one generally to do that stuff anyway, and they didn't even ask me whether I'd seen the show [The Flash]. They didn't tell me anything about what I was going to play, they just inferred that there was going to be a lot of meat to sink my teeth into.

I used to be mad on the games, but I had to ban myself. I used to spend three dollars on games, [but] it adds up, so now I'm on the social side of things like Twitter and Instagram. I love my weather apps. I guess because all the Brits are obsessed with weather.

Also, I just think of Draco and he gets me in the right mood. He just keeps getting worse and worse.

I don't go to the cinema much.

When I was 9 or 10 years old it wasn't the thing to be seen doing - reading a book in your spare time.

People's instinct when they hear someone is madly obsessed with Star Wars or Harry Potter or something like that, they think that it's odd and not as cool as being a massive sports fan or film nerd. But I think it's amazing and something that should be celebrated and definitely not looked down on or misunderstood.

If someone tried to take the hierarchy thing too seriously - for example, being lovely to producers but moaning to runners about the tea - that would not be accepted on 'Harry Potter'; someone would pull you aside and have a word.