Dorothy Tristan was born on May 9, 1934, in Yorkville Heights, New York City, and she began her career as a model, gracing the covers of magazines like Vogue and Life. She transitioned into acting with her debut in the 1970 film "End of the Road," directed by her first husband, Aram Avakian.

Her acting career took off with notable roles in films such as "Klute" (1971), where she played Arlyn Page, and "Scarecrow" (1973), where she portrayed Coley. She also appeared in "Down and Out in Beverly Hills" (1986) and "The Looking Glass" (2015).

Dorothy Tristan was a talented screenwriter. She co-wrote the films "Steal the Sky" (1988) and "Weeds" (1987) with her second husband, John D. Hancock. She also wrote the screenplay for "Suspended Animation" (2001), which was based on her novel, and "A Piece of Eden" (2000). Her work as a writer showcased her versatility and creativity in the film industry.

Her personal life included two marriages. She first married Aram Avakian in 1957, and they had two children, Alexandra and Tristan Avakian, before divorcing in 1972. In 1975, she married John D. Hancock, with whom she collaborated on several film projects.

Dorothy Tristan passed away on January 7, 2023, in LaPorte, Indiana, due to complications from Alzheimer's disease at the age of 88.