Star 80 is a 1983 American film about the true story of Playboy Playmate of the Year Dorothy Stratten, who was murdered by her estranged husband Paul Snider in 1980. The film was directed by Bob Fosse, and starred Mariel Hemingway and Eric Roberts.

The film was shot on location in Vancouver, British Columbia and Los Angeles, California; the death scene was filmed in the same house in which the murder-suicide actually took place. The story is based on the Pulitzer Prize-winning Village Voice article "Death of a Playmate" by Teresa Carpenter; the film's title was taken from Snider's vanity license plates.

The fictionalized director Aram Nicholas (played by Roger Rees) is based on Stratten's real-life lover, Peter Bogdanovich. Hugh Hefner sued the producers of the film because he did not like the way he was portrayed, perhaps in part because the article the film was based on suggested that Stratten was as much a victim of Hefner and Bogdanovich as she was of Snider. Hefner also later sued Bogdanovich for the negative portrayals in Bogdanovich's book about Stratten, The Killing of the Unicorn. In a 1998 interview, Hefner stated that he still disliked the film because it was a poor portrayal of Stratten, although he did commend Eric Roberts for "an excellent portrayal of the sick husband who murdered her."

Hemingway underwent breast enlargement surgery before filming began, but she has denied that she had the surgery for the film role. She would later have the implants removed after they ruptured.

Star 80 was the second movie based on the murder of Stratten. It was preceded by the 1981 television film Death of a Centerfold: The Dorothy Stratten Story in which Jamie Lee Curtis portrayed Stratten and Bruce Weitz portrayed Paul Snider.

Roberts earned a Golden Globe nomination for Best Dramatic Actor for his performance in the film. Star 80 was the last film Fosse directed.