Post goes viral after reader mistakes fan fiction for Harry Potter

Chris gives details of a rather explicit affair between Harry and Hermione - something that avid fans will know does not happen in the books. Photo / Shelley Zhang Twitter

A Harry Potter fan has been left in hysterics after discovering that her friend has mistakenly read a fanfiction take on the Wizarding novel.

Shelley Zhang, based in the US, was contacted by her friend Chris after he became a little concerned about the plot line of what he believed to be The Order of the Phoenix, according to the Daily Mail.

In a text to Shelley, Chris says: "So Dudley dies in Harry Potter right?"

Twitter user Shelley Zhang has shared the hilarious conversation she had with a friend who believed they were reading a Harry Potter book only to discover it was fanfiction. Photo / Shelley Zhang Twitter

A confused Shelley explains this is not the case leading to a baffled Chris revealing that he has just come to the part in the "book" where Dudley commits suicide.

It quickly transpires that Chris has indeed been reading a piece of fanfiction when he continues to explain other elements of the plot line.

Describing the happenings of what he thought to be fifth installment of the novel Chris recounts details of a romance between Harry and Hermione, Neville's struggles with potion addiction and Harry's pet snake - all of which true Potter fans will know to be false.

Clearly tickled by her friend's faux pas Shelley took to Twitter to share screen shots of their hilarious conversation.

Shelley's friend Chris got in touch with her when he thought the plot in his book was becoming a little far fetched. Photo / Twitter

However, it soon became clear that Dudley's death was not the only anomaly in his version of the JK Rowling classic. Photo / Shelly Zhang Twitter

Chris gives details of a rather explicit affair between Harry and Hermione - something that avid fans will know does not happen in the books. Photo / Shelly Zhang Twitter

After sharing an extract of what he has been reading Shelley is shocked as to how he had believed it to be genuine. Photo / Shelly Zhang Twitter

While the book did touch upon several true plot lines - they were often twisting into something more unsavoury. Photo / Shelly Zhang Twitter

She accompanied the images with the following tweet: 'Friend is reading Harry Potter for the first time.

"He suddenly realises he's read a fanfiction Order of the Phoenix instead of the real one."

The tweet quickly went viral receiving a total of 56,000 retweets and 133,000 likes since it was shared on Monday.

Following the immense response Shelley later tweeted: "Honestly, the best part about this is people tweeting about how this made them laugh or made their day. Chris (aka friend) and I are amazed."

Shelley was especially amused by the minute details, such as Harry Potter's efforts to get fit. Photo / Shelly Zhang Twitter

Shelley shared the screen shots on Twitter where they received a total of 56,000 retweets and 133,000 likes. Photo / Shelley Zhang

At several points Chris attempts to convince Shelley that the fanfiction version may actually be better than the original. Photo / Shelley Zhang Twitter

Eventually Chris reached the stage where he realised every word he read had been a lie. Photo / Shelley Zhang Twitter

Eventually he admits that there were some aspects of the book that he enjoyed and thinks others would too. Photo / Shelley Zhang Twitter