The team behind Disney’s stage adaptation of Frozen have repeatedly offered surprises, ensuring that the Broadway musical will deliver deeper explorations of characters and plot points while still celebrating the beloved songs and moments of the 2013 animated blockbuster.

The musical will premiere August 17 at the Denver Center for the Performing Arts, and a representative for Disney Theatrical Productions has confirmed that performances are slated to begin on Broadway at the St. James Theatre February 22, 2018, prior to a March opening.

While audiences wait to see Arendelle on stage, The New York Times has revealed a series of changes theatregoers can expect to see and hear once the lights go down.

While discussing the balance between the familiar and the unexpected, director Michael Grandage told the Times, “You want to do everything they know the piece to be, and go much deeper. It is incumbent upon us to come up with surprises.”

The show is set to open with a group of creatures referred to as “hidden folk,” similar to the Scandinavian folklore of “huldufólk” but with more animalistic qualities. The tailed figures replace the trolls seen in the animated feature. Gone with the trolls are the monstrous snowman Marshmallow and the wolves that chase Anna, Kristoff, and Sven.

Also new to the title are roughly a dozen new songs penned from the film’s Oscar-winning husband-and-wife pair, Kristen Anderson-Lopez and Robert Lopez. Joining favorites such as “Let It Go” and “Love Is an Open Door” are numbers including “Dangerous to Dream” and a “flashy” Act II anthem—both for Elsa (played on stage by Caissie Levy).

Watch a first-look at Frozen in rehearsals below: