JK Rowling 'graffitied' in hotel room where she wrote Harry Potter

The author shared evidence of her secret note on Twitter

JK Rowling has history of challenging her trolls (Getty Images )

'JK Rowling vandalises hotel room’ falls under the more unlikely category for headlines you might expect to read about the author.

But Rowling has confessed to making her mark on the room within which she wrote the last pages for the final instalment of the Harry Potter series to celebrate its completion.

Rowling’s self-described “graffiti” comes in the form of a scribble on the back of a bust of a Greek god, which reads: “JK Rowling finished writing Harry Potter and the Deathly Hallows in this room (652) on 11 July 2007.”

Rowling holed up in a suite in The Balmoral, in Edinburgh, to decide her protagonist’s fate in the Deathly Hallows nine years ago, and fans have reportedly paid four figures sums to stay in the room.