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.

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 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 have done a bit of recording and the songs are available on iTunes, and I've got some nice comments. It's something I enjoy doing, but I'm not looking for a singing career any time soon. As long as one person gets enjoyment out of it, I'm happy to make it available.

I had a great childhood.

When it was offered [a role in The Flash] I just thought it sounded like the perfect thing that I would want to do. Then they announced it online the day after and I was terrified, because I hadn't read anything, I hadn't shot anything. What if I'm awful? What if they fire me on the first day? But what I discovered was a bunch of really happy actors who want to make the best show possible, because it's fun. Not for any other reason.

You avoid the hype while you're working, you have to, but the premiere is the one night of the year where you can enjoy it.