Transcript for 'Frozen' Characters Make Appearance in 'Once Upon a Time'
How about "Frozen "? So many fans can't get it go hen it comes to Elsa and Anna and the other characters from the hit movie. They made their debut on "Once upon a time" yesterday. Chris Connelly takes us behind the scenes. Reporter: Do you want to build a snow -- monster? The billion-dollar animated hit "Frozen." Got a live action incarnation on Sunday night within the primetime world of ABC's "Once upon a time." Storybrooke. Reporter: Sisters Anna and Elsa. Now pulling the mystery of their parents' final journey. Their clothes and ship wreck much like the movie. Anna eager to search for the secret on the cusp of her wedding. Plenty of ice-ometrics. Some traffic-stopping Sperl effects. The troll also getting his post animation transformation, along with seven, now real-life creation. And the wardrobe transformed into needle and thread truth. It's a silk imported from Europe with Austrian crystals. Reporter: Before the premier, "Once upon a time's" "Frozen" crossover was one of the new TV season's more daring moves. How do they interweave these characters into "Once upon a time" without it being oversaturation. Reporter: The hashtag heavy response on Twitter may suggest zesz so far. But it's a nice thing. Reporter: For "Good morning America," Chris Connelly, ABC news, Los Angeles.
This transcript has been automatically generated and may not be 100% accurate.