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.

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.

“There was no world where we wouldn’t invite them to come be a part of this,” director Jon M. Chu tells The Hollywood Reporter. “The question for us was, how, and how much are they willing to do in it, and how much can the story itself handle it? Because they’re such iconic people and especially to these roles.”

While the main cast certainly delivers on talent and vocals, some 'Wicked' superfans may be more excited about some cameos. More Gareth Cattermole/ When Elphaba and Glinda arrive to Oz's capitol, Emerald City,