Australian actress Georgina Haig best known as Etta Bishop from "Fringe," will play the character voiced the "Frozen" ice queen, with "Once Upon a Time" co-creator Adam Horowitz.
Georgina Haig is also one of the stars of a new crime drama on the US network CBS, Reckless.
Georgina Haig joins Elizabeth Lail and Scott Michael Foster as newcomers to "Once Upon a Time," who will be playing Elsa's sister Anna and ice-cutter Kristoff, who falls in love with Anna.
Earlier this year Once Upon A Time, which features contemporary takes on characters such as Snow White, Prince Charming, Belle, Rumpelstiltskin and Red Riding Hood, confirmed it would bring the Frozen characters into its universe in the upcoming fourth season of the show.
Expect all three characters to recur during the fourth season.