JK Rowling has penned an open letter to UK voters on Brexit encouraging them to decide who the political monsters of the referendum are. 

The outspoken writer posted the lengthy letter dissecting one of the most 'divisive and bitter political campaigns ever waged' within the UK.

In the open letter she accuses political campaigners of creating monsters to coerce voters into choosing between villianous scenarios, 

Rowling, who has openly backed a vote to stay in the EU, has referenced her own heritage in her argument against leaving the European Union.

She labeled herself the 'mongrel product' of the European continent and promotes the strengths of multiple allegiances and cultural assosications. 

She said: "I glory in association with the cultures of my fellow Europeans. My values are not contained or proscribed by borders."

She voiced her opinion to her 7.5 million Twitter followers urging them to think carefully before voting to leave the EU Referendum, taking place on June 23.