'Once Upon a Time' Season 4: 'Frozen' roles for Scott Michael Foster and Elizabeth Lail

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scott-michael-foster-elizabeth-lail-ouat-frozen.jpg "Once Upon a Time" has cast two big roles as it brings "Frozen" into its fairy-tale universe in the fall.

Scott Michael Foster ("Greek," "Chasing Life") and Elizabeth Lail, who's taking on her first TV role, will play Kristoff and Anna on the series, TVLine reports. Anna's big sister Elsa has yet to be cast.

True to her characterization in the movie, Lail's Anna is described as resourceful and devoted to her sister. Kristoff, meanwhile, plays up his mountain-man persona but cares deeply for both sisters.

"Once Upon a Time" returns to ABC's Sunday-night lineup in the fall.
Photo/Video credit: Getty Images, UNC School of the Arts