What was J.K. Rowling’s first published work for stage performance?

J.K. Rowling’s first published work for stage performance was Harry Potter and the Cursed Child.

The play is credited to J.K. Rowling, John Tiffany, and Jack Thorne, with Thorne writing the script. Its story begins 19 years after the events of Harry Potter and the Deathly Hallows and follows Harry’s son Albus Severus Potter as he starts at Hogwarts. Draco Malfoy’s son, Scorpius, is also central to the plot.

The original production opened in London’s West End in 2016. It was directed by John Tiffany and first starred Jamie Parker as Harry Potter, Noma Dumezweni as Hermione Granger, and Paul Thornley as Ron Weasley.

The published script is a play text rather than an eighth Harry Potter novel. That distinction matters because the original seven books were prose novels, while Cursed Child was created for live theater and later staged in other cities.