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LONDON, ENGLAND - JULY 30: (L to R) Jamie Parker, Alex Price, Anthony Boyle, Sam Clemmett, J.K. Rowling, Poppy Miller, Jack Thorne, Noma Dumezweni, director John Tiffany and Paul Thornley attends the press preview of 'Harry Potter & The Cursed Child' at The Palace Theatre on July 30, 2016 in London, England. (Photo by David M. Benett/Dave Benett/Getty Images)

LONDON, ENGLAND - JULY 30:  (L to R) Jamie Parker, Alex Price, Anthony Boyle, Sam Clemmett, J.K. Rowling, Poppy Miller, Jack Thorne, Noma Dumezweni, director John Tiffany and Paul Thornley attends the press preview of 'Harry Potter & The Cursed Child' at The Palace Theatre on July 30, 2016 in London, England.  (Photo by David M. Benett/Dave Benett/Getty Images)