Ever wondered what it would be like to act as an extra in one of the Harry Potter movies? Thirteen-year-old Harrison talks about just that:
"When I found out I was going to be in the next Harry Potter film, I just couldn't believe it.
I'm in an acting agency and they put me forward for the audition.
So I went along but I didn't really think anything would happen.
Then they rang me up and told me I had got a part as one of the extras. I was really surprised. You don't think things like that will happen to you.
It was great fun on set. I don't get to say anything, I'm just wandering around in the background.
I'm in a few scenes. I'm not allowed to say much but I'm in a scene on the staircase in Hogwarts and at a Quidditch match. It's funny because Quidditch looks so real in the films but when you're on set it looks nothing like it does on the screen.
I got to wear Hogwarts' robes but sometimes we were wearing outside clothes as well.
I didn't speak much to the rest of the cast, but I did say hello to lots of them. I said 'Hello' to Daniel Radcliffe, the boy who plays Harry Potter, and he said 'Hello' back. He seemed nice.