J.K. Rowling Vandalized a Hotel Room in the Name of 'Harry Potter'

— -- J.K. Rowling is explaining how she left a little bit of magic in a hotel room after completing the "Harry Potter" series.

The 50-year-old author told fans on Twitter on Monday that Jan. 11 was the ninth anniversary of the day she completed "Harry Potter and the Deathly Hallows," the final book in the "Harry Potter" series.

Rowling revealed that she marked a bust in her hotel room with graffiti after finishing the book.

"Finished Hallows 9 yrs ago today," wrote Rowling. "Celebrated by graffiti-ing a bust in my hotel room. Never do this. It's wrong."

Rowling also attached a photo of her "graffiti" to her Twitter post. Along with her signature, Rowling left this message: "Finished Writing Harry Potter and the Deathly Hallows in this room (552) on 11th Jan. 2007" on the marble bust.

The Balmoral hotel, the Scottish hotel where Rowling stayed, renamed Rowling's room as the J.K. Rowling suite in her honor. According to the hotel's website, the J.K. Rowling suite contains Rowling's writing desk and the signed bust. It also features a brass owl door-knocker.

Although it has been years since Rowling has released a children's book, she said last November that she will "definitely" write more children's books in the future.