Seven Days in May is a 1964 American political thriller film about a military-political cabal's planned takeover of the United States government in reaction to the president's negotiation of a disarmament treaty with the Soviet Union. The film, starring Burt Lancaster, Kirk Douglas, Fredric March, and Ava Gardner, was directed by John Frankenheimer from a screenplay written by Rod Serling and based on the novel of the same name by Fletcher Knebel and Charles W. Bailey II, published in September 1962.