Peter Lindsay Weir AM (born August 21, 1944) is a retired Australian film director. He is known for directing films crossing various genres over forty years with films such as Picnic at Hanging Rock (1975), Gallipoli (1981), Witness (1985), Dead Poets Society (1989), Fearless (1993), The Truman Show (1998), Master and Commander: The Far Side of the World (2003), and The Way Back (2010). He has received six Academy Award nominations, ultimately being awarded the Academy Honorary Award in 2022 for his lifetime achievement career.