Daniel Mannix Petrie[1] (November 26, 1920 – August 22, 2004) was a Canadian film, television, and stage director who worked in Canada, Hollywood, and the United Kingdom; known for directing grounded human dramas often dealing with taboo subject matter.

He was one of several Canadian-born expatriate filmmakers, including Norman Jewison and Sidney J. Furie, to find critical and commercial success overseas in the 1960s due to the limited opportunities in the Canadian film industry at the time.

Throughout his life, Petrie maintained strong ties to the academic world, serving as the deputy chairman of the American Film Institute from 1986 to 1987.

Although Petrie stopped teaching, he maintained a strong relationship with the academic world throughout his career, holding a faculty position at the American Film Institute, where he also acted as deputy chairman from 1986 to 1987.

Petrie's theatrical films were rarely box-office successes, but they often featured large, well-known casts, such as The Betsy (1978), starring Laurence Olivier, Tommy Lee Jones and Robert Duvall.