Shortly after it got confirmed for a fourth season, last week’s episode of Once Upon a Time teased the appearance of an unexpected face: Elsa from the smash hit Frozen. Although various fairy tale characters have shown on up the show, this will be the first time it uses a character from an actual Disney animated movie. Entertainment Weekly has an interview with the show’s runners about the decision and what fans can expect from it, but readers should be forewarned that it contains extreme spoilers from the last season. Once Upon a Time is set to return to ABC in the fall.