HARRY POTTER AND THE CURSED CHILD By : J.K. ROWLING. Based on an original new story by J.K. Harry Potter and the Cursed Child is a 2016 British two-part play written by Jack Thorne based on an original story by J. K. Rowling, John Tiffany, and Thorne. , Harry Potter and the Cursed Child is the eighth story in the Harry Potter series and the first official Harry Potter story to be presented on stage. , Harry Potter and the Cursed Child is the eighth story in the Harry Potter series and the first official Harry Potter story to be presented on stage.