Robert Lacey (born 3 January 1944) is a British historian and biographer.
He is the author of a number of bestselling biographies, including those of Henry Ford, Eileen Ford and Queen Elizabeth II, as well as several other works of popular history.
He is best known for his work as historian to the Netflix award-winning drama The Crown.
Lacey was educated at Selwyn College, Cambridge where he studied history.