Calder Baynard Willingham, Jr. (December 23, 1922 - February 19, 1995) was an American novelist and screenwriter. He cowrote several notable screenplays, including Paths of Glory (1957) and One-Eyed Jacks (1961).

Willingham and Buck Henry collaborated on the screenplay for The Graduate (1967), which they adapted from a novel by Charles Webb; they won a BAFTA Award for Best Screenplay for their work and were also nominated for an Oscar.

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