The 'J.K. Rowling Reveals' meme parodies the Harry Potter author's habit of announcing surprising, often unsolicited, retrospective details about her characters long after the books were published. It gained massive traction in early 2019 following a series of tweets and interviews where she added diversity or bizarre physiological facts to the Wizarding World canon. Internet users began creating parody tweets where Rowling would 'reveal' increasingly absurd and nonsensical traits about beloved characters, often starting with the phrase 'J.K. Rowling reveals that...' This format serves as a critique of retroactive continuity (retconning) and has since become a staple for making fun of any creator who tries to stay relevant by altering their original work.