I grew up with a lot of cats like that and they always were so surprising, magnetic, and electrifying. You can't be with them too long because they burn you out but the energy, the impulsivity, and the freedom connecting them to their animal energy is just so powerful to watch. It's dangerous to live like that but it's riveting to watch.

Independent film is for actors that love to act.

I had to work with Ben Mendelsohn who's one of the great actors of our time. I had a lot of scenes with him and I was thrilled to be on the set with him; I just wanted to see how we were going to play it.

I keep my kids out of the whole business entirely. Allegra and Lucas are five and six and I'm not interested in them doing any acting at all. I don't want my kids in show business. I keep them as far away from my work as possible.

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.

I walked around my apartment with food in my mouth asking myself: "How do I come up with this voice?" Then I found the voice. I called the director and said on the phone: "Guess who you're talking to Chris? Sid, that's right Sid!" And that's how I came up with the voice. That's a true story.

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