Anna and the King of Siam is an American 1946 drama film directed by John Cromwell. An adaptation of the 1944 novel of the same name by Margaret Landon, it was based on the fictionalized diaries of Anna Leonowens, an Anglo-Indian woman who claimed to be British and became governess in the Royal Court of Siam during the 1860s. Darryl F. Zanuck read Landon's book in galleys and immediately bought the film rights.

Anna Harriette Leonowens was an Anglo-Indian or Indian-born British travel writer, educator, and social activist.