Transcript for A Behind-the-Scenes Look at Bringing 'Frozen' to Life

More now on the mashup of "Frozen" and "Once upon a time." Elsa and Anna have come to storybrooke. Reporter: Fans of ABC's "Once upon a time" were chilled and blown away when the characters of "Frozen" entered the live-action world of storybro storybrooke. The live action incarnation of animated royalty took months to perfe perfect. We're translating the animated characters and putting them into the real world environment. Reporter: I got a behind the scenes look at it all. Eduardo transforms sketches from "Frozen" to "Once upon a time." You have to replicate? We have. Reporter: Like her ice queen digs that are dripping in ice. There are swarovski crystals involved. Reporter: Literally? Yes. Reporter: I couldn't leave without trying Christoff. I feel like I'm sitting here and talking to Elsa. This is cool for me. You really want to do a good job of bringing that to life. I felt that pressure. Reporter: Do you find yourself busting out into song? All the time. All the time. As soon as I put this dress on, it comes into my head and it gets stuck there. ? Let it go let it go ? Reporter: What's next is a secret. Nice to meet you. Olaf, I think, I'm not quite sure yet. I think he might make a guest appearance somewhere. Reporter: We'll have to keep watching to see. For "Good morning America," Cameron Mathison, ABC news, Vancouver. Here's a look at a decleated sce -- deleted scene from last night. Seems like you're in a bad place. Lake you're giving up. Can't you people read? That's the last thing I'm doing. Is this a plan to help fix things? My plans are my plans. And no, cutting off your precious air-conditioning doesn't help me. So can you help me? Fix it? Sorry. I'm out of the leadership business. Okay if you want to see more, go to our website. Now to Amy and Sara. All right, George.

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