If you're a casting director, you're going to be curious to see what Timothy Spall's son is like. But when you get in the door, you have to have something to offer.

I'm sure that my father becoming seriously ill when I was 14 had a lot to do with my going from chubby to fat.

Because I was always a fat child, I got fatter and fatter, and I ended up 18 stone and with a 40-inch waist.

I'll probably always be 'Timothy Spall's son' and it's something I'm proud of. Maybe one day as well as that, they'll say of Timothy Spall that 'He's Rafe Spall's dad'.

One of the biggest gifts you can give a child is confidence, because confidence will take you miles - more than talent, more than anything else. So yes, I want my children to have confidence and to be kind.

I've done loads of things people have never seen, dramas on BBC4 and plays upstairs at the Royal Court and the Bush, and because I didn't go to drama school, they gave me an education.

My biggest ambition over everything is to have kids. It feels great. I'd love a big family.