People always tell me I'm nothing like my character. Well, hopefully not! He's a character who's very defined. He was purposefully written by Jo Rowling as very one-dimensional in the first few books, because you're supposed to hate him.

I'd rather play a character that was really, really different to me as to someone who is quite close to my character.

It's remarkable to see the advancements since the early days of [Harry] Potter with putting LEDs on everything, pointing sticks and measuring. Just archaic stuff. Now, it's like one guy with a laptop.

I'm terrible at texting people back. It takes me, like, three days. I'm not a big phone person.

I hope to be scaring children for the rest of my life.

No, I don't suppose I'm so much a collector sort of person.

As soon as you see 'Dame' in front of someone's name, you get nervous, but Dame Maggie Smith is the most wonderfully gentle woman I have ever met. She never had a bad word to say.