I did the bible as told through Hispanic people and they laughed and applauded. I thought, "Oh my god, this is what I want to do for the rest of my life."

Well I was about to be expelled from school, I had been arrested and a teacher said: "Why don't you try acting, instead of distracting the class? Why don't you use your comic talent for something more productive?" My maths teacher suggested I do comedy and I decided to have a go. I pursued it after that. I was about 17.

But when you are doing an animated voice, it has to have more energy than usual or it falls flat and doesn't work. For myself, I found that I had to put myself in the same physical or emotional state as Sid, in order to make that voice sound alive and authentic. So if there was a scene in which he was running, I would be running beforehand to sound out of breath. That's important because the audience can tell intuitively if it does not sound real.

Rehearsals make a huge difference.

I love his [Brad Furman] ferocious desire for perfection and his love of vitality, it feeds me, man. It feeds him and it feeds the whole crew. And he's got huge respect for talent. And that's why talent goes in and gives it 300% percent.

Sid [the character from 'Ice Age'] is a prehistoric sloth. Sloths move really slowly and they store food in the cheek pouches. That's where I got the voice that you hear. He had to sound as though he was storing food.

It doesn't make sense. [Republicans are] not for us. You're not for my values. We're working class people mostly and blue collar. We're your cops, we're your firemen, we're your carpenters and the things we need - we need to protect our unions, we need to protect our Medicare, we need to protect the working class person.