Andrew James Hamilton Lownie is a British historian and author.
He has written books about the royal family. This includes Traitor King: The Scandalous Exile of the Duke and Duchess of Windsor on the Duke of Windsor and his links with the Nazis, and Entitled: The Rise and Fall of the House of York on Andrew Mountbatten-Windsor and his involvement with Jeffrey Epstein. He has also written biographies of John Buchan and the Soviet spy Guy Burgess.
Lownie has written biographies of writer John Buchan, spy Guy Burgess and Lord Mountbatten and his wife Edwina. While researching for his book on the Mountbattens, Lownie found himself blocked by the Cabinet Office and University of Southampton from accessing some archive material, despite public money having been used in 2011 to acquire certain Mountbatten family papers for the university in order to "ensure public access".
In 2021, Lownie published Traitor King, a biography, based on fresh sources, of the Duke of Windsor. The former Edward VIII is alleged by Lownie to have been a Nazi sympathiser who gave aid and comfort to his country's enemies before and during the Second World War.
Lownie's biography of Andrew Mountbatten-Windsor (formerly Prince Andrew, Duke of York) and his former wife Sarah Ferguson, Entitled: The Rise and Fall of the House of York, was published in 2025. It contains a discussion of the then-Duke's role as a British trade envoy, as well as an account of his relationship with Jeffrey Epstein.
Lownie has also written a literary guide to Edinburgh, and edited several volumes of John Buchan's works.
In March 2026, The Times reported that Lownie's next endeavour would be a biography of Prince Philip, Duke of Edinburgh. Lownie did however say that this would not "be a hatchet job".
