Peter Lindsay Weir, AM (; born 21 August 1944) is an Australian film director. He played a leading role in the Australian New Wave cinema (1970-1990) with his films such as the mystery drama Picnic at Hanging Rock (1975), the mystery drama-thriller The Last Wave (1977) and the historical drama Gallipoli (1981). The climax of Weir's early career was the $6 million multi-national production The Year of Living Dangerously (1983).