Here's a look at Olivia Valli getting greenified before she dons the iconic Elphaba costume for "Wicked." Now celebrating 20 years on Broadway, the musical — running at the Academy of Music through Nov. 26 — remains a beloved crowd-pleaser. 📝/🎥 by Rosa Cartagena & Gabe Coffey / Staff #wicked20 #phillytheatre #phillyarts