"A Very Wicked Halloween: Celebrating 15 Years on Broadway" will reunite Tony Award winners Idina Menzel and Kristin Chenoweth, the original Elphaba and Glinda, who will perform and serve as hosts for the special. Additional guest performers include global music superstar Ariana Grande, multi-platinum recording artists Pentatonix, the current Broadway company of "Wicked" and more to be announced, all to honor the show's lasting cultural impact and the 15th anniversary of its unforgettable Broadway debut.