Ever since Once Upon a Time fans saw Elsa from Frozen in the final moments of the Season 3 finale, speculation has been running wild on which Hollywood actress could nab the coveted part ahead of Season 4.

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Elsa is said to be a relatively significant part of Once Upon a Time next season, so the actress who plays her will have a lot of responsibility on their hands. As such, it is likely that the producers will go with a more well-established actress.

Enstars has compiled a gallery of 10 actresses who could conceivably play Elsa in Season 4 of Once Upon a Time. These actresses include:

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Dianna Agron - the Glee actress bares a resemblance to the animated character and she may be in the right age range to play her.

Maggie Grace - Once Upon a Time has employed many actors and actresses who starred on Lost, and Grace would fit perfectly in that trend.

Elizabeth Mitchell - Another Lost alum who could play a slightly older version of the Elsa seen in Frozen.

Kristen Bell - The actress who voiced Anna in Frozen may switch over to play Elsa in Once Upon a Time. Bell has expressed interest in potentially doing the show.

Idina Menzel - Though not a blonde, Menzel voiced Elsa in the film, so she may be a no-brainer if they could get her, even though she does not exactly look like her animated character.

Casting for Elsa will likely be announced at some point this summer.

Once Upon a Time Season 4 premieres in the fall on ABC, returning to its regular Sundays at 8 p.m. timeslot.