Coup 53 is a 2019 British documentary about the 1953 Iranian coup d'état to overthrow Iranian prime minister Mohammad Mosaddegh, co-written and directed by Taghi Amirani and co-written and edited by Walter Murch.

Amirani devoted several years of sleuthing to research the story behind the 1953 coup. The film describes the departure of Amirani's family from Iran to England and then follows Amirani as he uncovers the evidence of the plot hatched by British and US intelligence, led by the CIA's Kermit Roosevelt Jr.

Central to the documentary is a series of clips in which actor Ralph Fiennes reads from a transcript of an interview with MI6 agent Norman Darbyshire, who admitted to plotting the coup (codenamed "Operation Ajax") together with the CIA