I think one of the main differences between being an English actor and being an American actor is that we have things like the class system in England.I'm middle class. But I've got what some people might consider to be a working-class accent, so you've got those sorts of elements in this country to consider, which, in America, exist, but not necessarily in the same way.

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

Every audition I get, I agonise over and I put everything I can into it.

I watched what I ate for a bit and did a bit of exercise. I wanted to look alright because I knew I had to take my clothes off and I knew I was starring alongside some extremely attractive women! I think it was Humphrey Bogart who said that the only reason people found him attractive was because of the attractive women he played opposite. So, as audience member you go: "Well, if she would find him attractive, then surely I must too!" Playing opposite beautiful actress of the calibre of Rose Byrne and Anna Faris is amazing - it does a lot of the work for you.

There's nothing so unattractive as vanity... particularly male vanity.

I love doing comedy, I really do. It was perhaps my first love. And I think, as an actor, you're young and you do school plays and the reason you go 'I might do more of this' is because you make people laugh in a school play. You don't go and do Hamlet when you're nine and go: "I feel people were really moved out there!" You do a silly voice and everyone laughs and you go: "Ooh, that feels quite nice. I might make a life out of this!"

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'.