Alfred Duff Cooper, 1st Viscount Norwich GCMG, DSO, PC (22 February 18901 January 1954), known as Duff Cooper, was a British Conservative Party politician, diplomat and author. He wrote six books, including an autobiography, Old Men Forget, and a biography of Talleyrand, the 18th and 19th century French diplomat. He wrote one novel, Operation Heartbreak (1950), which has been republished by Persephone Books.