I have a lot of heroes. I don't think people give enough of a tribute to their mentors. They try to act like they're spontaneous generations - they are faking liars.

I love cartoons. So when they came to me to make Ice Age and this sequel, I was so happy.

It was at a performance art space that's no longer around, Gusto House... All of these great performers from all over the country lived on the Lower East Side, and they would take somebody's living room that opened right onto the street, open the door and charge tickets and put up chairs.

I did 40 voices for Chris Wedge, the director of the first film, before coming up with the version we used. He was hard to please, I don't know why. I gave him really slow talking voices. then I thought perhaps Sid could be an Indian sounding sloth. To find out more about my character, I watched footage of sloths. I discovered that the food they store in their pouches rots and ferments and half the time they're drunk.

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.

Self-expression is something that you've crafted, something that you've found. You've practiced on that piano for hours, you didn't hang out with your buddies, you didn't go after the girls, you stayed in your own little geeky room or you wrote for hours.

I wanted to enjoy the process. I wanted to enjoy just being on stage and giving back and the feedback.