Composer Stephen Schwartz also cameos as the Oz soldier who allows Elphaba and Glinda into the Wizard’s palace, while the musical’s book writer Winnie Holzman similarly appears in the Emerald City, touting the Wizard’s ability to read the Grimmerie.

WARNING: SPOILERS AHEAD FOR THE WICKED MOVIE! DO NOT READ IF YOU DON'T WANT SOMETHING SPOILED. Ready? OK. The Wicked movie is here and we're so pumped as we get to watch Ariana Grande and Cynthia Eriv

Anyone who knows anything about Wicked is likely aware of how big a role the awe-inspiring voices of, and natural chemistry between, original Broadway stars Idina Menzel and Kristin Chenoweth played in turning the musical into an instant mega-hit.

The original Wicked Witch of the West and Good Witch of the North have made their way back to Oz. After months of speculation, the theatrical release of Wicked: Part One has confirmed surprise cameos from Broadway legends Kristin Chenoweth and Idina Menzel.

Wicked Cast REACTS to Idina Menzel and Kristin Chenoweth’s SURPRISE Cameos! (Exclusive) 'Wicked's Ariana Grande, Cynthia Erivo, Jonathan Bailey, Jeff Goldblum and Ethan Slater, chat with ET's Denny Directo about Idina Menzel and Kristin Chenoweth,

NOTE: Spoilers ahead for "Wicked." Turn back now if you wish to remain pure. Good news! "Wicked" is finally here — or at least, part one is — and fans can now see Ariana Grande and Cynthia Erivo's takes on Glinda and Elphaba in full.