This thesis is a history of the Sydney and Melbourne International Film Festivals, and covers the years from 1945 to 1972. Based primarily on archival material, it is an organisational history dealing with the attempts by the two Film Festivals to negotiate between the demands of �culture� and �industry� throughout this period. The thesis begins with a consideration of the origins of the Festivals in the post-war period �with the attempts by non-Hollywood producers to break into the cinema market, the collapse of the �mass audience�, and the growth of the film society movement in Australia. The thesis then examines the establishment in the early 1950s of the Sydney and Melbourne Festivals as small, amateur events, run by and for film enthusiasts. It then traces the Festivals� historical development until 1972, by which time both Festivals had achieved an important status as social and cultural organisations within Australia. The main themes dealt with throughout this period of development include the Festivals� difficult negotiations with both the international and domestic film trade, their ongoing internal debates over their role and purpose as cultural organisations, their responses to the appearance of other international film festivals in Australia, their relation to the Australian film industry, and their fight to liberalise Australia�s film censorship regulations.