In the final moments of Once Upon a Time's season-three finale, Elsa from Frozen showed up. While we only got a glimpse at her long braid and signature blue dress from behind, she is definitely ready to bring Winter to Storybrooke. The hit fairy-tale drama recently cast Anna and Kristoff, but the team has yet to decide who is playing the ice queen. We have a few ideas, so keep reading to see who should play Elsa on OUAT. And for even more stars who look like Disney princesses, check out other uncanny resemblances.