The Mitford girls were six sisters (Deborah, Jessica, Nancy, Diana, Unity and Pamela) that belonged to an aristocratic English family. Nancy Mitford (1904-1973) was a British writer who wrote novels and other books about the British aristocracy. Her best-known novels areThe Pursuit of Love and Love in a Cold Climate. She helped to popularise the "U", or upper-class, and "non-U" classification of linguistic usage and behaviour. Two of her sisters, Diana and Unity, became involved in right wing politics. They greatly admired Adolph Hitler and Diana married the British fascist leader Oswald Mosley.