VIDEO: Princesses in Pants! Take a Behind the Scenes Look at the Costumes of FROZEN

Frozen opens on Broadway tonight and this week Nightline stopped by the St. James to get a closer look at the fashion of Disney's brand new show! Check out the video below.

Frozen, a full-length stage work told in two acts, expands upon and deepens the tale's indelible plot and themes through new songs and story material from the film's creators; in fact, this new stage production features more than twice as much music as the film.

Based on the 2013 film written by a trio of Oscar® winners, Frozen features music and lyrics by the creators of the film score Kristen Anderson-Lopez (Up Here, Winnie the Pooh, In Transit) and EGOT-winner Robert Lopez (Avenue Q, The Book of Mormon, Up Here) and a book by Jennifer Lee (Zootopia, Wreck-It Ralph), the film's screenwriter and director (with Chris Buck). Frozen won 2014 Oscars for Best Song ("Let It Go") and Best Animated Feature.

Frozen's director is Michael Grandage, a Tony Award® winner (Red) and director of three Olivier Award-winning Outstanding Musicals (Merrily We Roll Along, Grand Hotel and Guys and Dolls), and Rob Ashford, Tony Award winner (Thoroughly Modern Millie) and multiple Tony and Olivier Award nominee, is choreographer.

Frozen stars Broadway veterans Caissie Levy as Elsa and Patti Murin as Anna. The two women are joined by principal cast members Jelani Alladin(Kristoff), Greg Hildreth(Olaf), John Riddle (Hans), Robert Creighton (Weselton), Kevin Del Aguila (Oaken), Timothy Hughes (Pabbie), Andrew Pirozzi (Sven), Audrey Bennett (Young Anna), Mattea Conforti (Young Anna), Brooklyn Nelson (Young Elsa), Ayla Schwartz (Young Elsa), Alyssa Fox (Elsa Standby), Aisha Jackson (Anna Standby) and Adam Jepsen (Sven Alternate).