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 18 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.