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.

I like the dueling club scene, where Daniel and I fight with our wands. I thought it was a brilliant scene to shoot. I think the end product looked really good.

One thing that people keep on saying to me is that the wealth and the fame must have made up for missing out on my childhood. But the idea of money - putting a price on your childhood - is ridiculous. You will never get those years back and you can't put a price on them.

When we're not trying to kill each other with spells, we just sit in in Daniel's dressing room watching cricket games on television.

The only time I can really relax is up a tree or somewhere outside. I love being outside.

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.

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.