The sweater that changed Oz, for good.

The internet is going wild over Elphaba’s (Cynthia Erivo) “sex cardigan” that she wears during an intimate scene with Fiyero (Jonathan Bailey) in “Wicked: For Good.”

After fleeing Emerald City with Fiyero on the day of his wedding to Glinda (Ariana Grande), Elphaba takes him to her secret tree house, where they share their true feelings to each other in a duet to “As Long as You’re Mine.”

Elphaba, smitten for Fiyero, takes off her usual black attire and slips into sexy black lingerie — before she puts on an enormous gray knit cardigan.

The fashion piece has gone viral on the internet, with fans sharing their epic reactions to Elphaba’s unexpected outfit choice.

Sharing a photo of the sweater on Anne Hathaway’s character in “The Devil Wears Prada

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