The African Queen is a 1951 adventure film adapted from the 1935 novel of the same name by C. S. Forester. The film was directed by John Huston and produced by Sam Spiegel and John Woolf. The screenplay was adapted by James Agee, John Huston, John Collier and Peter Viertel. It was photographed in Technicolor by Jack Cardiff and had a music score by Allan Gray. The film stars Humphrey Bogart (who won the Academy Award for Best Actor – his only Oscar), and Katharine Hepburn with Robert Morley, Peter Bull, Walter Gotell, Richard Marner and Theodore Bikel. The African Queen has been selected for preservation in the United States National Film Registry, with the Library of Congress deeming it "culturally, historically or aesthetically significant". The film currently has a 100% rating at Rotten Tomatoes, based on 35 reviews. Robert Morley and Katharine Hepburn play Samuel and Rose Sayer, brother and sister British Methodist missionaries in the village of Kungdu in German East Africa at the beginning of World War I in August/September 1914.