Lady Antonia Margaret Caroline Fraser CH DBE (née Pakenham; born 27 August 1932) is a British historian and author. She is best known for history books, biographies and detective stories.
Lady Antonia was the daughter of the 7th Earl and Countess of Longford. She was married to Hugh Fraser from 1956 until their divorce in 1977. She was then married to the playwright Harold Pinter from 1980 until his death in 2008. She attended the University of Oxford. Her first major book - a biography of Mary, Queen of Scots was published in 1969.
She was awarded a damehood in 2011 and was made a Companion of Honour in 2018.