How many movies have Lee Marvin and Robert Ryan acted in together?

They have worked on 4 movies together! Their first movie together was Bad Day at Black Rock (1955) while their highest rated movie together was The Dirty Dozen (1967). They have not worked together since The Iceman Cometh (1973).

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Theodore 'Hickey' Hickman
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Larry Slade
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Maj. John Reisman
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Col. Everett Dasher Breed