Peter Weir, in full Peter Lindsay Weir, (born August 21, 1944, Sydney, Australia), Australian film director and screenwriter known for intelligent emotional dramas that frequently explore the relationship between characters and their social environment.

He contributed to a renaissance in Australian filmmaking and directed a string of acclaimed Hollywood movies.

Weir grew up in a suburb of Sydney. After briefly attending the University of Sydney, he traveled to Europe in 1965. By the time he returned to Australia the following year, he had decided on a career in entertainment.

Weir began working as a stagehand for a television network, where he and other employees made short films for fun. Beginning in 1969, he worked for the government-funded Commonwealth Film Unit as a cameraman and director.

“There’s almost a fear that if you understood too deeply the way you arrived at choices, you could become self-conscious. In any case, many ideas which are full of personal meaning seem rather banal when you put words to them.”

Weir struck out on his own in 1973, and his first feature film, the comic-horror The Cars That Ate Paris (1974), which he also wrote, received some critical notice. He won an international audience with the haunting and atmospheric Picnic at Hanging Rock (1975), followed by The Last Wave (1977), for which he also cowrote the screenplay and which was reviewed more favourably in the United States than in Australia.

The World War I drama Gallipoli (1981), based on a story by Weir and starring Mel Gibson, won eight Australian Film Institute awards and burnished Weir’s international reputation. His last Australian production, which he cowrote as well as directed, was the masterful The Year of Living Dangerously (1982). The drama was set in Indonesia around the time of the overthrow of President Sukarno and starred Gibson and Linda Hunt.

In 1985 Weir directed his first Hollywood film, Witness, a character-driven thriller for which he received an Academy Award nomination.

He continued to earn acclaim with films such as Dead Poets Society (1989), a drama set in a boys’ preparatory school in the 1950s, The Truman Show (1998), a fable about the tyranny of the media, and Master and Commander: The Far Side of the World (2003), a seafaring epic based on the series by Patrick O’Brian and cowritten by Weir; the movies all earned Weir Oscar nominations for best director. His other films included The Mosquito Coast (1986), Green Card (1990), Fearless (1993), and The Way Back (2010).