Nanna Popham Britton was an American woman who gained notoriety as a mistress of Warren G. Harding, the 29th President of the United States. In 1927, Britton revealed that her daughter, Elizabeth, had been fathered by Harding while he was serving in the United States Senate, one year before his election to the presidency. Britton's claim was open to question during her lifetime, but in 2015, Harding's paternity was finally confirmed by DNA testing.