Once Upon a Time‘s take on Frozen is taking shape, with the casting of two key roles for Season 4.

TVLine has learned exclusively that newcomer Elizabeth Lail will play Anna, Queen Elsa of Arendelle’s younger sister, while Greek grad Scott Michael Foster has landed the recurring role of Anna’s beau Kristoff.

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Still remaining to be cast for the opening arc of the ABC drama’s Season 4 is Elsa herself.

Once‘s Anna is described as a fun-loving, fearless optimist who often gets herself into situations where she is in over her head, yet is able to triumph due to her resourcefulness and can-do spirit. She values her relationship with her sister Elsa above all else.

Kristoff meanwhile is a hearty, salt-of-the-earth ice cutter whose sometimes-gruff demeanor can hide his deep love for Anna and her sister Elsa. When we first meet him on Once, he is adjusting to life at the castle — including sleeping indoors for the first time in his life.

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In addition to his run as Greek‘s Cappie, Foster’s TV credits include The River, Californication and this summer’s Chasing Life and Halt and Catch Fire.

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