Diana, Lady Mosley (née Freeman-Mitford; 17 June 1910 – 11 August 2003), usually known as Diana Mitford was one of the noted Mitford sisters.
She was married first to Bryan Walter Guinness, son and heir to the Baron Moyne. Secondly, she married Sir Oswald Mosley, leader of the British Union of Fascists. She was divorced from her first marriage on the grounds of adultery with Mosely.
Her second marriage, in 1936, took place at the home of Joseph Goebbels, with Adolf Hitler as guest of honour. Later her involvement with fascist political causes resulted in three years' internment during the Second World War.
She later moved to Paris and enjoyed some success as a writer. In the 1950s she contributed stories to Tatler magazine. She edited the magazine The European. In 1977 she published her autobiography, A Life of Contrasts. She died in Paris on 11 August 2003.