The actresses played the original Glinda and Elphaba on Broadway Getty Images 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. But you’ll also see some familiar faces singing to them. Now in theaters, “Wicked” tells the story of what happened before Dorothy came to Oz, and how the witches came to have their