Peter Weir (b. August 8, 1944) is an Australian film director.
Weir achieved considerable success in Australia with Picnic at Hanging Rock (1975), and Gallipoli (1981), both regarded as classic Australian cinema. The Last Wave was a pensive, ambivalent film which explored the interaction between the native Aborigine culture and the European. His first two American films, Witness (1985) and The Mosquito Coast (1986) provided Harrison Ford with opportunities to play new kind of roles. Dead Poets Society (1989) brought him significant commercial success and Green Card (1990) will remain a favourite with many comedy lovers.