Author JK Rowling once again spoke out against radical gender ideology, condemning the practice of placing biological men who identify as women into female-only spaces.

“The message to girls everywhere: you are a costume that any man can put on. Once he’s wearing it, he gets to take your rights,” Rowling posted on X Friday. 

Her comments came in response to a report in The Times about Marla-Svenja Liebich, 53, who will be transferred to a women’s prison in Germany after only months of claiming to be female. Liebich, formerly the leader of a banned neo-Nazi group, previously campaigned for Russian president Vladimir Putin and voiced support for the war against Ukraine. Despite once calling transgender individuals “parasites on society,” Liebich took advantage of Germany’s new policy allowing people to change their gender on official documents by simply filling out a form at a government office.

Rowling has been outspoken for years about the dangers of transgender ideology. In 2020, she drew backlash after criticizing an article that referred to “people who menstruate” instead of women. 

“‘People who menstruate.’ I’m sure there used to be a word for those people,” she wrote at the time. “Someone help me out. Wumben? Wimpund? Woomud?” 

That same year, Rowling published a lengthy essay explaining why she has spoken out against “sex and gender issues,” raising concern about “the new trans activism,” the rising number of young women seeking to transition, and the growing trend of detransitioning.

Since then, Rowling has continued to voice her objections to biological men being allowed in women’s sports, prisons, and other female-only spaces. Following President Donald Trump’s re-election last year, she posted, “What I do know is that millions of women in the UK and across the developed world are extremely angry about men in women’s sport, men in women’s jails and the erosion of single-sex spaces. Parents are angry at being demonised because they don’t want their troubled kids to undergo irreversible medical treatments of extremely questionable benefit. People are sick to the back teeth of being bullied and threatened for refusing to embrace an elitist, academia-generated ideology that’s having severe real world consequences.”