Nan P. "Nanny" Britton (November 9, 1896 – March 21, 1991) was Warren G. Harding's mistress who publicly revealed in 1928 that he had fathered her illegitimate daughter (Elizabeth Ann Britton Harding Blaesing) shortly before his election as President in 1920. Her revelation was controversial during her lifetime but was confirmed by DNA testing in 2015.