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's all about respect; he's looking for respect from his buddies. In the last one he just wanted to hang out, to be part of the group, but this time he wants more from his friends. And without giving the story away, he finally gets something that he has been looking for when the mini sloths kidnap him and take him to their tribal area. He gets to be the Fire King and they worship him and there is an amazing scene with a "call and response" sequence in the style of Cab Callow [the legendary American jazz singer and band leader] between him and his audience.

My parents were incredibly strict, almost military style.

Self-expression, to me, is something that you worked on, that you have mastered a skill to say something in the most artful way that you can. It's not just blurting stuff out and having verbal diarrhea.

I had a great movement teacher - he showed me how to walk so I wasn't becoming like a cartoon.

Voices come to me but to maintain them is hard work. They go away just as easily, so I have to remember them and that takes work. With Sid, I needed to make sure you could understand what he is saying, his enunciation. Sometimes I couldn't even say my own name [his name] in his voice. It sounds like 'Shid', it sounds a bit like he has a lisp.

You grow up Latin in this country and you're a third class citizen from the word go, and so you have to deal with everything around you from that point of view and trying to feel entitled.