Lady Rachel Billington (born 11 May 1942) is a British author, the daughter of the Earl and Countess of Longford (Frank and Elizabeth Pakenham), who were both eminent writers. She is the sister of Lady Antonia Fraser and Thomas Pakenham, also writers. Her husband is the film director Kevin Billington. She has published 19 adult novels and 7 children's books since her first novel, All Things Nice, came out in 1969. Her novel A Woman's Age was a bestseller. Other works include Bodily Harm and Loving Attitudes, as well as television plays, screenplays and journalism.