Which play did J.K. Rowling help create as the story author of its Harry Potter continuation?

J.K. Rowling helped create Harry Potter and the Cursed Child as the story author of the stage play.

The play was written by Jack Thorne and directed by John Tiffany, with a story credited to Rowling, Thorne, and Tiffany. It is set nineteen years after Harry Potter and the Deathly Hallows.

The plot follows adult Harry, now working at the Ministry of Magic, and his son Albus Severus Potter. Their relationship and a time-traveling crisis form the play’s central conflict.

The original West End production opened at London’s Palace Theatre in 2016. The published script is officially presented as the eighth story in the Harry Potter series, although it is a play rather than an eighth Rowling-authored novel.