In “Wicked,” Elphaba and Glinda travel from Shiz University to the Emerald City on a glistening green train to meet the wizard.

Ariana Grande and Cynthia Erivo say they made "a clear choice" to befriend each other when they were cast in Wicked — something not all stars do on film sets. Their offscreen chemistry is something co-star Jeff Goldblum says is "rare and uncommon."