ABC's 'Once Upon a Time' Casts Elizabeth Mitchell for FROZEN Storyline

In a bit of mysterious casting, ABC's Once Upon a Time will welcome actress Elizabeth Mitchell as part of a Season 4 storyline inspired by the hit Disney animated film 'Frozen,' according to EW.

Mitchell is best known for her role on ABC's 'Lost' and most recently starred in ABC's V and NBC's Revolution. While no details have been revealed as to Who The actress will portray on the drama, the site shares she is "possibly malevolent with ties to previously announced Frozen siblings Anna (Elizabeth Lail) and Elsa (Georgina Haig) as well as to Storybrooke and Arendell. The upcoming season of Once Upon are expected to take place following the events depicted in the 2013 animated Disney film.

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