Emmanuel and Brigitte Macron will offer "scientific" evidence and photos proving that France's first lady is a woman, the lawyer representing them in a US lawsuit said Friday.

Attorney Tom Clare said the Macrons planned to testify in their case against conservative American commentator Candace Owens, whom the plaintiffs accuse of helping fan online rumors about whether the French president's wife is a transgender woman.

"There will be expert testimony that will come out, that will be scientific in nature, that will also demonstrate the falsity of the statements," Clare said in an interview on the BBC.

Clare's comments on "Fame Under Fire," a BBC podcast, were confirmed to AFP by spokespersons for his law firm.

Speculation around Brigitte Macron's gender has swirled in France for years.

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