In terms of my relationships with a lot of the adult characters, when I was working with Harrison, it wasn't like a verbal agreement, but we both understood that because there was this constant tension between our characters, we couldn't say "Cut" and start acting normal. We had to keep an essence of that relationship in our characters off screen which is really important.

For me, with any character, there are different ways that you approach understanding him, and in this film in particular, because I had the novel to refer to. It's always really helpful to have all of that information and all of those hundreds more words which give you an idea into the background and your character and all.

Some advice to you guys, don't ever take keep your phone in your pocket whilst on a roller coaster.

When you're younger, you get scripts that you are too young for and now I'm getting scripts, which I think, "I'm too old for this character." They can always shift things around to make it work and make the ages work. But I'm definitely getting more complex and interesting roles and less what you would expect. So I can experiment more and have a bit more freedom when I'm putting things on tape.

I can clap really fast. I can beatbox. I can type the alphabet in under 2 seconds. That's probably the one I'm most proud of.

In terms of my relationships with a lot of the adult characters, when I was working with Harrison, it wasn't like a verbal agreement, but we both understood that because there was this constant tension between our characters, we couldn't say "Cut" and start acting normal. We had to keep an essence of that relationship in our characters off screen which is really important.

I've had a lot of consoles as a kid so there has always been something that I've done as a pastime or with friends and for personal enjoyment. I don't play many sports so it gives me an opportunity to have that same competitive feeling and the same reward when you win but using different techniques. It's much more mental.