Wicked, the untold story of the witches of Oz, stars Cynthia Erivo (Harriet, Broadway's The Colour Purple) as Elphaba, a young woman, misunderstood because of her unusual green skin, who has yet to discover her true power, and award-winning artist and global superstar Ariana Grande as Glinda, a popular young woman, gilded by privilege and ambition, who has yet to discover her true heart.