Director Jon M. Chu explains the secret filming of 'Wicked' cameo from original Broadway stars Idina Menzel and Kristin Chenoweth. Interview.

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.

But what about the stars of the original Broadway musical, Idina Menzel and Kristin Chenoweth, who originated the roles of Elphaba and Glinda, and can fans of the original musical expect to see the famous original performers in the theatrical motion picture?

The original "Wicked" witches choose their favorite songs in the musical. Unlimited. Together, they're unlimited. That's always been the case for Idina Menzel and Kristin Chenoweth, who originated the roles of Elphaba and Galinda in the Broadway production of Wicked.

“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.”

Idina Menzel, Kristin Chenoweth, Ariana Grande and Cynthia Erivo posed together on the "Wicked" carpet at the Los Angeles premiere of the film.

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,

The Wicked movie starring Cynthia Erivo and Ariana Grande finally hit theaters on November 22 and featured appearances from Chenoweth and Menzel in brand new roles. Fans began to suspect that Chenoweth would be making a cameo in the film back in August,