Sarah Gristwood is a bestselling biographer and commentator on royal affairs. She regularly contributes to documentary series such as The Royal House of Windsor, The Windsors: Inside the Crown, The Queen Mother, and Inside… Balmoral/Windsor Castle/St Paul’s Cathedral, Westminster Abbey, as well as appearing on international news channels from CNN to Sky News, and BBC World to CBC. A former film journalist, she has also authored or co-authored books on the history of royal weddings; Beatrix Potter; Winston Churchill; and Virginia Woolf and Vita Sackville-West; while her Tudor histories include, most recently, Game of Queens and The Tudors in Love.