An early Halloween treat has arrived in the form of news that the original stars ofWickedwill reunite to celebrate the 15th anniversary of the Broadway smash.

Idina Menzel and Kristin Chenoweth, who portrayed Oz residents and onetime friends Elphaba and Glinda in the musical, are set to headline a special tribute concert on Oct. 29 that will be broadcast on NBC.

The event will feature songs from the blockbuster musical hit, with performances from the shows original dynamic duo, the Broadway productions current company, and special guests like Ariana Grande and Pentatonix, with more expected to be announced.

WickedOriginal cast photo, 2003

Joan Marcus

Wickedis a blockbuster musical playing all over the world and still selling out night after night after 15 years on Broadway, and were thrilled to be partnering with Emmy and Tony-winning producer Marc Platt and the entire WICKED team to celebrate the enduring success of this show, said Doug Vaughan, Executive Vice President, Special Programs and Late Night, NBC Entertainment in a press release.

Were especially excited to have Idina Menzel and Kristin Chenoweth reunited along with big guest stars in front of an audience in costume hopefully to help us celebrate the Halloween season.

The show will be held at New Yorks Marquis Theater and produced by the original team behind the Tony-winning hit Marc Platt, Ricky Kirshner, and Glenn Weiss, who will serve as director.

Wickedcenters on the early years ofThe Wizard Of Ozs good and wicked witches, and focuses on Dorothys arrival in Oz from their perspectives.

Based on the novel by Gregory Maguire, the stage hit features music and lyrics by Stephen Schwartz and a book by Winnie Holzman.