Is that a wedding dress I spy? I believe it is! But the only way to find out will be to tune in to Season 4 of Once Upon a Time where Elizabeth Lail and Georgina Haig take on the roles of “Frozen” sisters Anna and Elsa. According to the recently updated extended synopsis of the show’s rapidly approaching Season 4 we should get plenty of flashbacks in Arendelle where we will meet the “Frozen” crew.

And don’t forget, according to Executive producers Adam Horowitz and Eddy Kitsis, Anna and Kristoff (Scott Michael Foster) are registered at the Wandering Oaken’s Trading Post and Sauna!

Once Upon a Time premieres Sunday, September 28th on ABC