A Harry Potter star has once again spoken out against JK Rowling, directly describing the author as “embarrassing.”Rowling’s online controversy dates back several years. In 2020, she infamously mocked the phrase “people who menstruate” and argued that biological sex cannot be erased. She later published a lengthy essay outlining concerns about gender identity, single-sex spaces, and medical transition, while repeatedly denying accusations that her views are transphobic.Credit: Universal StudiosShe has continued posting extensively ever since. In 2024, Rowling challenged Scotland’s new hate crime law by describing several trans women as men and daring police to arrest her. And in 2025, she appeared to take a swipe at Daniel Radcliffe, Emma Watson, and Rupert Grint after years of disagreement.Those comments have increasingly put Rowling at odds with the stars who helped make Harry Potter a global phenomenon. Radcliffe, Watson, and Grint have all publicly supported the trans community, while other Wizarding World actors have taken positions ranging from directly criticizing Rowling’s views to defending her right to express them.Now, one has responded to the writer on X to label her “embarrassing” amid her latest public rant.Credit: Universal Studios JapanRELATED: REPORT: Disney’s ‘Percy Jackson’ Facing Imminent Cancellation as ‘Harry Potter’ Takes Over‘Harry Potter’ Star Issues Scathing Response to JK RowlingSean Biggerstaff, best known for playing Gryffindor Quidditch captain Oliver Wood in the Harry Potter film series, responded to Rowling’s recent rant on August 20.Rowling shared a post on X that read: “If you walked up to Mike Tyson in a bar and punched him in the face, I doubt ‘you can’t hit back because I’m so puny!’ would save you from consequences. Same on X. If you want to punch me in public but don’t want to risk a brain injury in return, stick to your own weight class.”If you walked up to Mike Tyson in a bar and punched him in the face, I doubt ‘you can’t hit back because I’m so puny!’ would save you from consequences.Same on X. If you want to punch me in public but don’t want to risk a brain injury in return, stick to your own weight class.— J.K. Rowling (@jk_rowling) August 20, 2026Biggerstaff responded with a concise yet critical post of his own.“This is extraordinarily embarrassing,” he wrote in a direct response to Rowling. “Listen to yourself, for God’s sake.”This is extraordinarily embarrassing. Listen to yourself, for God's sake.— Sean Biggerstaff (@Seanchuckle) August 20, 2026 Rowling has not acknowledged Biggerstaff’s message. However, she has responded to criticism from other Harry Potter stars in the past.In September 2025, Watson addressed the rift on Jay Shetty’s podcast, saying there was “no world in which I could ever cancel her out.” Despite their opposing views on trans rights, she said she could still “treasure Jo,” adding that she wished they had been able to have a conversation.Rowling responded days later with a lengthy X post. She accused Watson of participating in the “trashing of women’s rights,” said the actress was “ignorant of how ignorant she is,” and rejected her conciliatory tone, arguing that Watson could not publicly criticize her views and still expect their former relationship to remain unchanged.Credit: Warner Bros.The author also said, “Emma and Dan in particular have both made it clear over the last few years that they think our former professional association gives them a particular right – nay, obligation – to critique me and my views in public. Years after they finished acting in Potter, they continue to assume the role of de facto spokespeople for the world I created.”She did not mention Grint, despite the actor also actively standing up for the trans community in recent years.The divide has also followed Harry Potter into its next chapter. HBO’s reboot has already faced backlash over questions about its necessity and Rowling’s involvement as an executive producer. HBO has defended her role, saying her views have not affected casting or hiring, despite the controversy continuing to follow the series.Credit: HBOControversial ‘Harry Potter’ Reboot Prepares for ReleaseSeason 1, also known as Harry Potter and the Philosopher’s Stone – not Sorcerer’s Stone as the first book and film are known in the U.S. and select other countries – is set to hit HBO in December.The reboot is led by newcomers Dominic McLaughlin as Harry Potter, Arabella Stanton as Hermione Granger, and Alastair Stout as Ron Weasley. John Lithgow plays Albus Dumbledore, with Janet McTeer as Minerva McGonagall, Paapa Essiedu as Severus Snape, and Nick Frost as Rubeus Hagrid.Credit: HBORELATED: ‘Harry Potter’ Reboot Casts a New Ron Weasley Halfway Through FilmingThe wider cast includes Lox Pratt as Draco Malfoy, Johnny Flynn as Lucius Malfoy, Katherine Parkinson as Molly Weasley, and Bel Powley and Daniel Rigby as Petunia and Vernon Dursley. Warwick Davis also returns to the wizarding world, once again playing Hogwarts professor Filius Flitwick.HBO is already looking beyond the first book. The series has already been renewed for Season 2, with filming scheduled to begin before Season 1 even premieres. Nicholas Hoult has also joined the cast as Gilderoy Lockhart – a key character in Harry Potter and the Chamber of Secrets – while the show is currently seeking its new Ginny Weasley after actress Gracie Cochrane exited the production following Season 1 filming.The youngest Weasley child, portrayed by Bonnie Wright in the films, also plays a key role in the second installment of the Harry Potter series.What do you think of Sean Biggerstaff’s message to JK Rowling on X?The post ‘Harry Potter’ Star Claps Back at JK Rowling, Claims She’s “Embarrassing” appeared first on Inside the Magic.