Twelve O'Clock High is a 1949 American war film about aircrews in the United States Army's Eighth Air Force who flew daylight bombing missions against Nazi Germany and occupied France during the early days of American involvement in World War II. The film was adapted by Sy Bartlett, Henry King (uncredited) and Beirne Lay, Jr. from the 1948 novel 12 O'Clock High, also by Bartlett and Lay. It was directed by King and stars Gregory Peck, Hugh Marlowe, Gary Merrill, Millard Mitchell, and Dean Jagger. The film was nominated for four Academy Awards and won two: Dean Jagger for Best Actor in a Supporting Role, and Thomas T. Moulton for Best Sound Recording. In 1998, Twelve O'Clock High was selected for preservation in the United States National Film Registry by the Library of Congress as being "culturally, historically, or aesthetically significant".