1944- . US director and producer. His films, often with science-fiction themes and using special effects, include THX 1138 1971, American Graffiti 1973, and the Star Wars trilogy 1977-83, Raiders of the Lost Ark 1981, Indiana Jones and the Temple of Doom 1984, Willow 1988, and Indiana Jones and the Last Crusade 1989, most of which were box-office hits.