Emmanuel Macron and his wife, Brigitte, are planning to present photographic and scientific evidence to a US court to prove Mrs Macron is a woman.
Their lawyer says the French president and Mrs Macron will present the documentation in a defamation suit they have taken against the right-wing influencer Candace Owens after she promoted her belief that Brigitte Macron was born male.
Ms Owens' lawyers have responded with a motion to dismiss the claim.
Speaking to the BBC's Fame Under Fire podcast, the Macrons' lawyer in the case, Tom Clare, said Mrs Macron had found the claims incredibly upsetting and they were a distraction to the French president.
I don't want to suggest that it somehow has thrown him off his game. But just like anybody who is juggling a career and a family life as well, when your family is under attack, it wears on you. And he's not immune from that because he's the president of a country, he said.
Mr Clare said there would be expert testimony that will come out that will be scientific in nature and while he would not reveal, at this stage, its exact nature, he said the couple were prepared to demonstrate fully both generically and specifically that the allegations are false.
It is incredibly upsetting to think that you have to go and subject yourself, to put this type of proof forward, he said.
When asked if the Macrons would be supplying pictures of Brigitte pregnant and raising her children, Mr Clare said they existed and would be presented in court where there are rules and standards.
Ms Owens has repeatedly promoted her view that Brigitte Macron is a man, claiming she would stake her entire professional reputation on the allegation.
The Macrons initially won a defamation case in France against bloggers who made similar allegations. However, that ruling was overturned on appeal in 2025. The Macrons are now appealing that decision and have filed a lawsuit against Ms Owens for promoting false claims, citing the need to defend their honor against a known conspiracy theorist.
