“Slave Play” playwright Jeremy O. Harris popped up at Paris fashion week, and gave an impromptu performance.

A Telfar show featured dancing models, and we’re told Harris, who created dialogue for the show’s accompanying film, “got up and joined in.”

“He was break dancing on the runway with all the models clapping,” a source said.

Designer Telfar Clemens also hosted a party for “Slave Play” at New York Fashion Week.