Tickets for the new booking period will go on sale on 22 November
Harry Potter and the Cursed Child has extended in the West End until February 2018.
Tickets for the show, which is currently sold out until December 2017, will go on sale on 22 November at 11am. 60,000 seats will be released for performances between 13 December 2017 and 4 February 2018.
The production, which is JK Rowling's eighth story in the Harry Potter series, opened in July this year to a flurry of five star reviews, including one from WhatsOnStage's Sarah Crompton.
Tickets will start from £15 for each of the two parts of the play, with 300 tickets less than £20 for each performance.
Harry Potter and the Cursed Child is booking at the Palace Theatre until 4 February 2018.