If you thought Jk Rowling was all super grown-up and wise and never, ever did anything wrong because she created the best set of books EVER... you'd be wrong. Well, at least half wrong. She's been known to get involved in a little vandalism, admitting to her fans via Twitter that the hotel where she completed the final Harry Potter book bears her stamp. 

JK RowlingNot as innocent as she looks

Okay, so it wasn't a hugely serious act of vandalism, but there is a bust of Hermes in one of the rooms at the Balmoral Hotel in Edinburgh that has the words 'JK Rowling finished writing Harry Potter and the Deathly Hallows in this room (652) on 11th January 2007' written on it. Rowling confessed her naughtiness, warning people not to copy her, in a Twitter post celebrating the 9 year anniversary of the occasion.

'Finished Hallows 9 yrs ago today. Celebrated by graffiti-ing a bust in my hotel room. Never do this. It's wrong', she said, posting a photo of the message on the bust.

It costs about £1,415 to stay in the room; well, at least it does these days, post-Rowling; and there's no word yet on whether officials at the hotel have contacted Rowling with a bill for the damage, but one can only imagine that it has in fact increased the value of that room significantly.

More: JK Rowling speaks out in support of black Hermione

In fact, the Telegraph claimed that a member of the hotel staff revealed they were honouring the suite. 'As JK Rowling finished her book in this suite, we thought it would be a nice way to honour this', they said. 'The room is exactly the same as when Miss Rowling finished her book there.'

There's a message to take away: Always check the busts of the hotel rooms you visit - you never know what you might find there.