CAMBRIDGE, MA - JUNE 5:  Author J.K. Rowling autographs a book for a student graduating from Harvard University's at commencement ceremonies June 5, 2008, in Cambridge, Massachusetts. J.K. Rowling, who wrote the popular Harry Potter books, was the commencement speaker. Getty Images logo Getty Images 17 months ago

CAMBRIDGE, MA - JUNE 5: Author J.K. Rowling autographs a book for a student graduating from Harvard University's at commencement ceremonies June 5, 2008, in Cambridge, Massachusetts. J.K. Rowling, who wrote the popular Harry Potter books, was the commencement speaker.