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Hedy Lamarr signed her first Hollywood contract with Metro-Goldwyn-Mayer (MGM). Lamarr was a Hungarian-American actress and inventor. She is best known for her roles in films such as Algiers (1938), Boom Town (1940), and Samson and Delilah (1949). Lamarr was also a pioneer in the field of radio technology. In 1942, she co-invented a frequency-hopping spread spectrum communication system that was used by the US Navy during World War II.