"Once Upon a Time" is officially back from hiatus to begin filming for season 4, and now fans have the first spoilers from set photos with the cast, both old and new.

According to E! Online, new parents Ginnifer Goodwin and Josh Dallas reported for duty for "Once Upon a Time" season 4, and were seen carrying a fake baby.

"Everyone was constantly smiling, so happy and relaxed, even played and joked around with the fake baby," said a witness. "It appears Josh has been working out. He looks good."

In addition, "Once Upon a Time" season 4 will see the introduction of three new recurring characters from the "Frozen" universe, including Scott Michael Foster as Kristoff, Elizabeth Lail as Anna, and Georgina Haig as Elsa.

"Ahhhh blonde hair- sometimes I think you look quite nice, other times like village of the damned high school reunion," tweeted Haig as she was spotted filming in the classic Elsa costume for "Once Upon a Time" season 4.

According to spoilers by co-creators Adam Horowitz and Eddy Kitsis, "What we can say is we're very aware of what we think makes this character from 'Frozen' so special and we want to honor that and make sure that what we do is in the universe of everyone fell in love with this past year."

In several set photos, Haig was seen filming with Hook, portrayed by Colin O'Donoghue, in civilian clothing.

Does this Hook and Elsa have a history together?