Don’t cross JK Rowling. Seriously, she can be dastardly to anyone who gets in her way. Luckily, we haven’t had to find out the hard way unlike Stephen Fry, who narrated the Harry Potter audiobooks.

On his latest stand-up tour, the soon-to-be ex-QI presenter reportedly explains that - when the pair first met - all he knew about the first book was that it was a children’s novel that had sold well enough to get a sequel.

"Good for you," he apparently told her, not realising that Harry Potter would go on to be the worldwide cultural phenomenon it is today.

Years later, he was doing his job as normal when, reading The Prisoner of Azkaban, he came across a part where the titular character pockets something.

Harry Potter and the Philosopher's Stone illustrations Show all 5 1 /5 Harry Potter and the Philosopher's Stone illustrations Harry Potter and the Philosopher's Stone illustrations Harry Potter and the Philosopher's Stone Jim Kay's illustration of Draco Malfoy in the new Harry Potter and the Philosopher's Stone edition Jim Kay Harry Potter and the Philosopher's Stone illustrations Harry Potter and the Philosopher's Stone Jim Kay's illustration of Rubeus Hagrid in the new Harry Potter and the Philosopher's Stone edition Jim Kay Harry Potter and the Philosopher's Stone illustrations Harry Potter and the Philosopher's Stone Jim Kay's illustration of Hermione Granger in the new Harry Potter and the Philosopher's Stone edition Jim Kay Harry Potter and the Philosopher's Stone illustrations Harry Potter and the Philosopher's Stone Jim Kay's illustration of Ron Weasley in the new Harry Potter and the Philosopher's Stone edition Jim Kay Harry Potter and the Philosopher's Stone illustrations Harry Potter and the Philosopher's Stone Deluxe edition will cost £150 and a more affordable £30 version will be published alongside it Bloomsbury

“Harry pocketed it” was the exact phrase in the book. It turns out this phrase was particularly hard to say, with Fry accidentally saying “Harry pocketeded it” every time except for when speaking very slowly.

According to Petty Revenge Stories Tumblr, who wrote up Fry’s story: “They tried time and time again to get it right, but to no avail.

“Eventually, he called up JK and asked if he could say ‘Harry put it in his pocket’ instead. She thought for a moment, then said ‘no’, and hung up.

“The phrase ‘Harry pocketed it’ appeared in the next four books.”