Harry Melling

I've also just finished filming the role of Robert Brown in 'Just William,' which is due to transmit on BBC One at Christmas.

I do look a bit different because Dudley was a very piggish character and about three years ago I lost quite a considerable amount of weight. It means that I can lead a normal life without the baggage of people running after me and shouting things at me.

It doesn't have to be a problem for children to be fat, but it does affect you: you aren't as happy in that skin.

I was doing a show at the National Youth Theatre, playing an old man. Before that I had played fat clowns and I thought, 'If I want to have the career I would like, I am going to have to lose weight.' I was just starting drama school, and found I was moving around a lot. I also started to eat sensibly. The weight just dropped off.

Toffee Crisp was my downfall. I once ate five at a sitting. Do you really need that third helping, Harry? My parents didn't overfeed me, nor did they make an issue of it. That's when things go wrong. It doesn't have to be a problem for children to be fat, but it does affect you: you aren't as happy in that skin.

I can now shed the child-actor thing, like the fat, and start a new career, because no one sees me as Dudley.

I am a really bad traveler, I hate traveling and I hate being late so I figure if I could just click my fingers and be somewhere then that would be great!

I am not sure how much Dudley will feature just because of the grand scale of the film and the fact that there are so many stories and characters to tie up. I haven't seen the film yet but I think it will be a blink-and-you'll-miss-it moment, but it was nice just to round it off and give it some closure.

I also started to eat sensibly. The weight just dropped off.

I am auditioning again - getting back to theatre would be amazing.