July 2, 2014 / 9:49 AM

'Once Upon a Time' casts 'Frozen' characters Anna, Kristoff for season four

The series first teased the "Frozen" characters' involvement with a shot of Princess Elsa at the end of season three.

Actor Scott Michael Foster has been cast to play "Frozen" character Kristoff in ABC fairy tale series "Once Upon A Time." (UPI Photo/ Phil McCarten) | License Photo

LOS ANGELES, July 2 (UPI) -- Once Upon a Time has found its Anna and Kristoff.

Elizabeth Lail will portray the princess, with Scott Michael Foster as her ice-cutter beau. Lail is a relative newcomer, and Foster counts Greek and Californication among his credits. Princess Elsa has not yet been cast.

Welcome for Scott Michael Foster & Elizabeth Lail, the new #ouat characters for season 4! #Anna #Kristoff pic.twitter.com/qgXH9he5Ih
— Magic Oncer (@OncerMagic) July 2, 2014

TV Line reports Once Upon a Time's Anna will retain her "fun-loving, fearless [optimism]" from Frozen. She values her relationship with sister Elsa "above all else," and uses her "resourcefulness and can-do spirit" to triumph in situations where she is "in over her head." Kristoff will be as down-to-earth as ever, and will be living in the castle with Anna and Elsa. His gruff demeanor sometimes masks his love for the princess, and the series finds him sleeping indoors for the first time.

The fourth season of Once Upon a Time premieres this fall.