I think coughing up slugs was quite hard. Ron has a scene where he has to cough up these giant slugs. I had this giant slug in my mouth loaded with slime and I spat them out. I think it was plastic. I hope it was plastic.

I found out that you could audition by sending a picture of yourself and some information to Newsround.

I went out with people, but never anything too serious. It wasn't that easy. Now it's something I'm really looking forward to.

I’ve loved the whole process. From previews to rehearsals, I’m in the best company. I’ve done one West End show before this but the excitement here…it’s incredible. It’s been a real education working on this, I don’t feel worthy. The role is over the top, bold and ridiculous.

Yeah, my parents help me keep my feet on the ground.

I was such a huge fan of Harry Potter books. That's how I got into it. I had never really thought about acting or a career. I just wanted to be Ron, really. It was a very unusual introduction into the industry, and we learned so much. It's been a real education and an evolution. I really, really enjoy this.

I do get one chance to dance [in GoF], I had to dance with Maggie Smith. That was the only dancing experience I had, which was actually quite enough really.