Stephen Colbert: 'Mr. Peabody and Sherman Were Two of My Favorite Things'

"The Colbert Report" star discusses his new role as Paul Peterson in "Mr. Peabody and Sherman."
3:00 | 03/07/14

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Transcript for Stephen Colbert: 'Mr. Peabody and Sherman Were Two of My Favorite Things'
And so many kids are excited about the launch today of Mr. Pea bod and Sherman. I have a date with my girls tomorrow. So excited is Stephen Colbert. He talked to josh about how this new project gave him the chance to indulge his childhood passion for cartoons. Take a look. Reporter: He's best known for his sharp wit and trademark brand of political humor on "The Colbert Report." The republicans are on record as trying to deport Dora. And they condemn spongebob as a form of birth control. Reporter: But Stephen Colbert's latest animated role in "Mr. Peabody and Sherman" is less political and more affectionate nod to an old childhood favorite. Your name is bull winkle. Reporter: Rocky and bull winkle. What was your relationship with it as a child? I was a wee lad and would sneak in, 1 of 11 kids and I'm the youngest and so I would sneak in, kind of hide among my other brothers and sisters to be able to stay up to watch it. It was on at night. It wasn't on during the day and I loved it. Mr. Peabody and Sherman were two of my favorite things. Here Sherman. Reporter: He was intent to share that joy with his three kids. This was available on DVD. I got for my kids and said you can watch this as much as you want. Wear it out. Reporter: It follows the ex-employs of that brainy dog, Mr. Peabody and his human sidekick Sherman using their way back time machine. So what did the kids think? They were thrilled. Are you Mr. Mpeabody. I'm like no. Reporter: Your character. Dad. My daughter penny is a friend of Sherman's and they get into a tiff at school and come over to meet with Sherman's dad who I didn't know he was actually a dog. I thought it was a metaphor. Reporter: For someone who thrives on the manic energy of a live audience -- You're barking up the wrong tree, mister. Reporter: The intimacy of a recording booth was an entirely different experience. He's got my daughter inside that giant space apple. It's always something I would assume as a performer, something of a jarring thing you're never actually -- You never actually see anybody. You hear other people's performances but for the first, I don't know, for the first four times you record it's just you in a room. My face is numb. The nice thing they're laughing in the booth. The director and producers are there and it's actually a lot of fun. The comedic prowess that is Colbert, not just limited to his show or the movie screen. Ha. Reporter: But also evident in his recent role as pistachio pitch man. Pistachios, pistachios, wait for it. Pistachios. None of that was cgi, by the way. He's in tlshg the green fellow is in there. I trained for months to split my head open. That was not a real eagle. I'd rather not say because if it was an actual real eagle that's a federal offense. It was against the law to keep a captive eagle for entertainment purposes so if it was an actual eagle then I'm a fugitive. Reporter: The commercial was a fan favorite and marketing gold during a super bowl that attracted some 150 million viewers. It was the most watched television event in the history of the medium. Well done. Well done. The hand, there you go. Backhand and like -- That's why I want to be an actor. Oh, yeah, oh, yeah, oh yeah. Thank you. Oh, he's so much fun. "Mr. Peabody and Sherman" in theaters everywhere beginning today.

This transcript has been automatically generated and may not be 100% accurate.

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