'Once Upon a Time' Creator Teases First FROZEN Episode on Twitter!

'Once Upon a Time' Creator Teases First FROZEN Episode on Twitter!As BWW reported last week, Georgina Haig, best known for her role as Peter and Olivia's daughter, Etta on Fox's cult sci-fi series "Fringe", will take on the role of Elsa when an all-new FROZEN storyline begins this fall on ABC's ONCE UPON A TIME. The beloved character from the hit Disney film FROZEN was voiced by Broadway's Idina Menzel. (Read story in full here!)

Now, 'Once' co-creator Adam Horowitz has turned to Twitter to share the title page of the script for the first episode of the season, teasing that it will focus on a 'tale of two sisters.' Could the siblings he is referring to be Elsa and Anna? Horowitz captions the image: "Here's our first #OnceUponATime #titlespoiler of season 4 -- hope to see ya this fall!"

In addition to the Haig casting news, ABC also revealed that newcomer Elizabeth Lail has been cast in the role of Anna, the younger sister of Queen Elsa, while Scott Michael Foster will play Anna's beau Kristoff. Haig currently appears on CBS' "Reckless," which has just wrapped filming on its 13-episode order.

Below, watch an ABC teaser announcing the arrival of FROZEN on 'Once Upon a Time':

Source: @AdamHorowitz