"Harry Potter" author J.K. Rowling through the years.

Credit: AP

The "Harry Potter" author lights the Empire State Building to mark the launch of her non-profit children's organization Lumos, in Manhattan on April 9, 2015.

Credit: AP Photo Dan Hallman

J.K. Rowling, left, and fellow author Ann Patchett at an appearance to promote her latest book "The Casual Vacancy," at The David H. Koch Theater in New York.

Credit: Getty Ben Pruchnie

LONDON, ENGLAND - SEPTEMBER 27: Author J.K. Rowling attends photocall ahead of her reading from 'The Casual Vacancy' at the Queen Elizabeth Hall on September 27, 2012 in London, England. (Photo by Ben Pruchnie/Getty Images)

Credit: Getty Ben Pruchnie

LONDON, ENGLAND - SEPTEMBER 27: Author J.K. Rowling attends photocall ahead of her reading from 'The Casual Vacancy' at the Queen Elizabeth Hall on September 27, 2012 in London, England. (Photo by Ben Pruchnie/Getty Images)

Credit: Getty Images

British author JK Rowling in London. (Feb. 13, 2011)

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