Kate Williams is a British author, historian and television presenter. She is a professor of history at the University of Reading.

Her first book, England's Mistress: the Infamous Life of Emma Hamilton was published in 2006, after five years of research in archives across the world. It was Book of the Week on Radio 4, a Book of the Year in the Times and theIndependent and shortlisted for the Marsh Prize for Biography. 

Kate is the Director of Life Writing and Lecturer at Royal Holloway, University of London.

She has discussed her books on BBC Breakfast, CNN and Sky News on Mariella Frostrup's Sky Arts show and on the Simon Mayo Book Show on Radio 2, Radio 4's Open Book, Woman's Hour, the Today Programme and BBC News. 

Kate gives lectures to societies, events and dinners regularly in England and Europe, and literary festivals, including the Telegraph Hay Festival, the Times Cheltenham Festival, the Sunday Times Oxford Festival and Dartington Ways with Words.