'Once Upon A Time' Season 4 Spoilers- Will The 'Frozen' Storyline Feature Olaf & Sven?

Are you ready to build a snowman? Well Once Upon A Time is.

The hit ABC series is about to take on the world of Frozen and we have learned a few spoilers about the new season from the executive producers, Edward Kitsis and Adam Horowitz.

When Elsa was introduced to viewers in the last two minutes of the third season finale, fans literally went crazy. With nothing more to go on than the actress's backside there have been so many questions regarding the new storyline. Like, will Olaf and Anna make an appearance? Is the story going to be set after the movie? And will viewers get to see Arendelle? Well Entertainment Weekly just sat down with Kitsis and Horowitz and they answered some of our burning questions.

We already know that Elsa, Anna, and Kristoff have been cast in the series, but what about Olaf, our favorite snowman? Will he be making an appearance?

As of right now, Once Upon A Time will be Olaf-less, as Horowitz says, "It wouldn't fit, and it's so beautiful, his story in the movie," he explains. "The story we want to tell doesn't involve trying to expand upon that, nor do we think it should."

As far as other characters that will be making the jump from the big screen to TV, they say, "We did cast Sven, but that hasn't been announced." Kitsis adds, "That was an actual reindeer. That was an adventure. You don't want to be in that casting session."

As far as the storyline for the characters, they do confirm that the first half of the season will be centered around the Frozen story arc and that the events will be set after those of the film.

"What happened in the film was so beautiful," Edward says. "We're picking up these characters after the movie."

The creative team also hints at a few details about what Arendelle is going to look like in the series.

"We plan to show you Arendelle and plan to show hopefully, a redefinition of it that feels faithful to the movie but also feels not animated but real," Horowitz explains. "That's going to be a challenge, but one we're really excited to try and meet."

"We both have children, we love Frozen, we were so inspired by the film and we were lucky enough that Disney let us bring to life the fanfic we would normally write on the web secretly," Kitsis concludes.

To find out more spoilers about the fourth season of Once read the full interview here.