I Was a Communist for the FBI is a 1951 American crime film noir produced by Bryan Foy, directed by Gordon Douglas and starring Frank Lovejoy.

[5] The story follows Cvetic, who infiltrated a local Communist Party cell for nine years and reported to the Federal Bureau of Investigation on the group's activities.

The film was preceded by a radio series also titled I Was a Communist for the FBI, starring Dana Andrews, that consisted of 78 episodes and aired on more than 600 stations in the United States from March 30, 1952 to September 20, 1953.

[6] In a contemporary review for The New York Times, critic Bosley Crowther wrote: "[T]he writing, the acting and the direction of this film are in a taut style of 'thriller' fiction that the perceptive will recognize.

Direction of Gordon Douglas plays up suspense and pace strongly, and the cast, headed by Frank Lovejoy in the title role, punches over the expose of the Communist menace.