The world fell in love with Queen Elsa and her sister, Princess Anna as their love for each other ultimately saved their kingdom, Arendelle from the eternal cold in Disney's film "Frozen."

During the finale of "Once Upon a Time's" third season, Queen Elsa made a quick appearance to tease her involvement in the Season Four. There are little details on how Queen Elsa will be portrayed in the TV series, and fans out there are incredibly curious.

TVLine.com has some insider secrets on the "Frozen" sub-story in OUAT. The outlet revealed that Elsa will be appearing in nine series episodes while Anna will be in eight and Kristoff may appear in six episodes.

Queen Elsa's character in Disney's "Frozen" was always good. She wasn't an evil queen in the traditional sense but her powers and spell were the starting point for the "problem" in the story.

So, given OUAT's penchant for story twists, it'll be interesting to know if Elsa will be a good or bad character in the show.

TVLine.com wondered if Elsa's appearance is before the reunion with Anna or after and the series creators responded: "Maybe yes, maybe no. It could be after. One can be in a snit for many reasons," said Adam Horowitz.

When it comes to the film, the showrunners have always been vocal about their desire to maintain the feel of the movie, provide continuity and honor the characters the world has loved.

According to Entertainment Wise, Elsa's character will be expounded on as the show progresses.

"You know, there's a backstory to how she appeared in Rumpel's vault, and what she's up to now when she's walking out of that farmhouse that we'll get into very quickly, most likely in the premiere. And in doing so, we very much want to honor what came in the movie, said Horowitz.

"We're not trying to redefine the character; what we're trying to do is take this beloved character and fit her into our world."

All this talk of Elsa but no word has been given as to who will be playing the beloved new-generation Disney stars. The last news was that auditions for the show's new characters have commenced.

Are you excited for the fourth season of "Once Upon a Time?" Fans sound off below!