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 in 1994, with the Library of Congress deeming it "culturally, historically or aesthetically significant". The film led to an Academy Award for Best Actor awarded to Humphrey Bogart. Samuel Sayer (Robert Morley) and his sister Rose (Katharine Hepburn) are British Methodist missionaries in the village of Kungdu in German East Africa at the beginning of World War I in August/September 1914. Their mail and supplies are delivered by a small tramp steamer named the African Queen, helmed by the rough-and-ready Canadian boat captain Charlie Allnut (Humphrey Bogart), whose coarse behavior they tolerate in a rather stiff manner. When Charlie warns them that war has broken out between Germany and Britain, the Sayers choose to stay on, only to witness the Germans burning down the mission village and herding the villagers away.