Jonathan Groff talks about his epic ballad in ‘Frozen 2’

The highly anticipated sequel hits theaters today and Groff’s character, Kristoff, focuses on proposing to Anna.
4:37 | 11/22/19

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Transcript for Jonathan Groff talks about his epic ballad in ‘Frozen 2’
we're talking about "Frozen II" in theaters starting today for the first time in forever we have Jonathan Groff right here. Nice. I ke what you did there. So happy to see you. So happy to see you too. I met you when you were first in "Hamilton." In a deli. You play king George, stole the show and now here you are again doing it all over again. I know. I'm so excited. What a great group to be part of and I know you shared your big night with your nieces. Yes, yes. You brought them to the premiere. Yeah, so we had a premiere in L.A. And I have two nieces, 2 1/2 and 4 1/2 years old. Must be a rock star. I know, so cute and I was a little nervous because it's a big movie, you know, with big music and big action scenes and they didn't blink through the entire thing. They were like on the edge of their seats, loved every second Do they look at you a little differently. They don't really get it. Disconnect because the voice. They sort of enjoyed the night generally. It was really my mom who, you know, used to dress me up as Mary Poppins and Cinderella as I kid and now it's her grandchildren. It was like such an amazing night for the family. Your mom is so proud of you. I want to show everybody a clip. You're in this. Kristoff is getting serious about Anna and trying to take the relationship to the next level. Take a look. Listen, ooh. Did Elsa seem weird to you? She seemed like Elsa. Hmm. That last word really seemed to throw her. What was it? I don't know. I don't know. But, ah -- ? Ice. Oh, come on. She couldn't act out ice? I better go check on her. Thanks, honey. Love you. Love you too. That's fine. Kristoff, I like he checked his breath. Check, check, check. So in the first "Frozen" we barely get to hear that gorgeous voice of yours. In this one you get your own ballad. Yes. And kind of pect affectly fit for your love of '80s. The two who did the music for this wrote Kristoff this epic '80s ballad and the animation that goes with it is like can't wait for everyone to see the movie starting today. By the way. It's like an '80s music video. It's sort of like kind of for the adults. The little kids don't really get Living your best animated life. I was. A duet with me and my reindeer. I think we have it. Can we listen to it? Yeah. Now I know you're my true north because I am -- Yes. Get your lighter out. Go back to the '80s. So good and you guys are all such a family. We talked to your co-stars. You had a little party of four so in London idina had a performance. You decided it was time to karaoke. Oh, my god. Look at you. There we are. It was 1:30 in the morning at a gay bar in London, idina did a surprise set. Oh, my gosh. The bar is called heaven and it really was my idea of heaven, I need to be there. Yeah, it was good. Josh gad is really bringing it home. He really brought the vocal, yeah, he really let it loose. Speaking of bringing the vocal, there was a duet in "Frozen II," everybody. It was cut. Yeah. With Kristen bell however Jonathan is going to share with us a couple of lines. Okay. So this is really like behind the scene. Wow. This is like really insider It's also on the deluxe edition of the album. Oh. So it's not that -- But you'll premiere it first. I'll give it to you live so that is exclusive. Right? We'll do it live. We'll do it live. I'm gonna get this right, baby I'm gonna love you in the way you deserve Go, Jonathan. I want to be yours, darling but I'm having trouble getting up the nerve Thank you. I mean, can you imagine? This handsome devil. First animated alter ego. You have to see "Frozen II." See Jonathan also in "Little shop of horrors" off Broadway. "Frozen II" in theaters right now.

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

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