Margaret Landon (September 7, 1903 – December 4, 1993) was an American writer who became famous for Anna and the King of Siam, her 1944 novel of the life of Anna Leonowens. Her book on Leonowens was published in 1944 and became an instant bestseller. It eventually sold over a million copies and was published in more than twenty languages. In 1950, Mrs. Landon sold the musical play rights to Richard Rodgers and Oscar Hammenstein II, who created the musical The King and I from her book. A later work, Never Dies the Dream, about her own experiences, appeared in 1949.