Once Upon A Time A new trailer for Season 4 of "Once Upon a Time" teases the arrival of "Frozen" character Elsa. Photo: ABC

Take out your winter gear because a “chilling” new trailer for “Once Upon a Time” Season 4 has hit the Web! The upcoming season is only a couple weeks away from its Sept. 28 premiere, and ABC has released a promo to give fans a look at the icy new drama headed toward Storybrooke.

The “Once Upon a Time” trailer reintroduces viewers to the fairytale characters they have come to know and love -- Snow White, Prince Charming, Rumplestitlskin, the Evil Queen and more. Each character has been involved in the “ongoing battle between good and evil,” and this season a couple new faces will join that fight -- Anna and Elsa of Disney’s 2013 animated hit, “Frozen.”

“Now, two sisters -- Elsa and Anna -- join Sunday’s most enchanting drama,” the announcer teases in the video. “When the town of Storybrooke gets frozen over.”

Like the previous teaser, the video shows Elsa waltzing down the street in Storybrooke wearing her signature sparkly blue dress. A trail of ice follows the train of dress -- shocking some of the residents.

“That’s a new one,” Hook says, looking on in awe. Emma can be seen beside him; gun drawn and mouth open in surprise.

But just because Emma and Hook are unfamiliar with Elsa doesn’t mean that others in town are unfamiliar with the “Snow Queen.”

“I’m the Queen,” Elsa says to an unidentified person in a brief clip. Meanwhile the Evil Queen tells her magic mirror that a mysterious woman “needs to be removed.”

Season 4 of “Once Upon a Time” premieres on ABC on Sunday, Sept. 28, at 8 p.m. EDT. Watch the extended trailer below and tweet your thoughts to @AmandaTVScoop.