Fans can't help but wait for the fourth season of ABC's series Once Upon a Time to arrive in national television, since it will showcase some of Disney's newest and most popular characters: Anna, Elsa, and Kristoff from Frozen. But who will play their roles in this live-action series? Some names have been finally announced online, revealing the actors behind two of the three characters.

Anna will be played by newcomer Elizabeth Lail, who is currently an unknown to mainstream audiences-though it could be guaranteed that she will be an instant hit when she hits the television sets.

Kristoff will be played by a more familiar face, actor Scott Michael Foster. ABC Family viewers might have finally seen him first as "Cappie" from the series Greek. His additional credits include several series, such as "The River," "Californication," and most recently "Chasing Life" and "Halt and Catch Fire."

Elsa, who was shown from behind in the final episode of Once Upon a Time's third season, still remains a mystery.

While Once Upon a Time features a vast number of well-known characters who have appeared in Disney films, the show is simply views Disney characters from a different perspective and never before heard alternate universe where not every aspect of every character carries over. While everyone knows Anna, Elsa, and Kristoff quite well by now from multiple Frozen viewings, that doesn't mean they will be totally alike with their big screen characters compared to the TV show.

The only way to find out is to stay tuned when Once Upon a Time returns this fall. For the time being, you can see Scott Michael Foster, who will be playing Kristoff, in Chasing Life, which is on ABC Family tonight at 9|8c.