Called "Harry Potter and the Cursed Child", it will tell the "untold part" of the boy wizard's story, including the story of the lives of his murdered parents.
However, the author said the play was "not a prequel".
It will run at the Palace Theatre in the summer of 2016, with tickets on sale this autumn.
Rowling said she chose to make the announcement today because it is "a very special day" - the 18th anniversary of when her debut book, Harry Potter and the Philosopher's Stone, was first published in the UK.
"To answer one inevitable (and reasonable!) question - why isn't Cursed Child a new novel? I am confident that when audiences see the play they will agree that it was the only proper medium for the story," she added.
The play was first announced in December 2013, after the author said she had "received countless approaches" over the years "about turning Harry Potter into a theatrical production".
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
