The author of the famed 'Harry Potter' book series J.K. Rowling has sent fans of the boy wizard into a frenzy as she recently announced that a new spin-off 'Harry Potter' short story will be released on Halloween.

J.K. Rowling
The new short story will be published on Halloween

The forthcoming tale, around 1,700 words long, will focus on the spiteful Hogwarts professor Dolores Umbridge, who first appeared in 'Harry Potter and the Order of the Phoenix,' which was published in 2003.

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The malicious witch is well known for forcing Harry to scar himself on the hand while he reportedly wrote the sentence, "I must not tell lies" with a Blood Quill.

"Umbridge is not only one of the most malicious Potter characters, she is the only person other than Lord Voldemort to leave a permanent physical scar on Harry," said the update posted to on Friday (Oct 24th). "The new exclusive J.K. Rowling content provides a rich, 1,700-word back story about Umbridge's life filled with many new details, as well as Rowling's revealing first-person thoughts and reflections about the character."

Professor Umbridge was portrayed by British actress Imelda Staunton in the film series, first appearing in the 2007 instalment.

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This will be the latest spin-off of 'Harry Potter' that Rowling will have released since publishing another short story in July, which was a 1,500 word tale depicting the adult lives of the young wizard, Hermione Granger and Ron Weasley, many years after their storied adventures, reuniting at the 2014 Quidditch World Cup, all aged 34.