It is time for the fans of the ABC show, 'Once Upon A Time', to commence their celebrations. The show has been always secretive about their filming locations and dates to ward off onlookers and foot traffic to give their best at work, but, a Twitter message from Adam Horowitz shows that a shoot is underway in British Columbia.

The previous leaks have showed that the first half of the upcoming 22 episodes will feature a 'Frozen' theme. Anna, Elsa and Kristoff have been officially cast. Snow and Charming will be seen getting used to life as new parents. Rumpelstiltskin will have some explanations for Belle. Emma unknowingly brings Marian, Robin Hood's love, the present day world. Emma and Regina are going to be icy with Emma suffering from the guilt of destroying Regina's relationship with Robin Hood.

The following is the official synopsis: 'Master storytellers Edward Kitsis and Adam Horowitz ("Lost," "Tron: Legacy") invite everyone to join Emma Swan, Snow White, Prince Charming, The Evil Queen, Hook and all the other resident fairy tale characters as they prepare to defend themselves against a magical force from the past that's too dark and unpredictable even for Rumplestiltskin - The Ice Queen'. Though the synopsis does not reveal much, fans can expect the story to dive straight in between the relationship of the two sisters, Anna and Elsa. Also, it is highly likely that the evil Elsa will be here and the sisters will not unite happily ever after, but sources say that the Ice Queen will not be the Queen Elsa from Disney.

Also, Captain Hook will be given a fashion makeover this season - he loses his pirate gear. Elizabeth Mitchell has been signed in too, but her role is being kept a secret by production.