I'm not one for doing the children's party version: "Hi, I'm a character in a movie and now I'm in reality!" I was doing the last shot of the film before reshoots outside their shop. I was starting my run into the frame and I thought, "You are literally ending where this began. The loop of serendipity's too much to not go in and acknowledge it." I just wanted to see the look on their faces.

I'm a Prince of Wales Trust ambassador, so I'm all about giving youth an education, a voice and a chance to not take the wrong road.

I'm sad in a way that the character [Doctor Strange ] leaves [neurosurgery] behind. It's an amazing discipline.

Sherlock being the most prevalent, and they've been really good fun.

Only when Stephen Strange has his accident and everything that he's ever had in his life falls apart that he becomes pretty monstrous. It's the self-loathing rage of a wounded animal and he doesn't have a coping mechanism at all. It ties in with the discipline and the magic of this world.

Writing in French is one of my ambitions. I'd like to be able to dream one day in French. Italian and French are the two languages that I'd like to know.

I've realised now that the reality of children is you have to be in the right place with the right person.