Nunnally Hunter Johnson was an American screenwriter, film director, producer and playwright. As a filmmaker, he wrote the screenplays to more than fifty films in a career that spanned from 1927 to 1967. He also produced more than half of the films he wrote scripts for and directed eight of those movies. In 1940 he was nominated for the Academy Award for Best Adapted Screenplay for The Grapes of Wrath and in 1956, he was nominated for the Directors Guild of America Award for Outstanding Directing – Feature Film for The Man in the Gray Flannel Suit. Some of his other notable films include Tobacco Road (1941), The Moon Is Down (1943), Casanova Brown (1944), The Keys of the Kingdom (1944), The Woman in the Window (1944), The Mudlark (1950), The Desert Fox: The Story of Rommel (1951), My Cousin Rachel (1952), The Three Faces of Eve (1957), Mr. Hobbs Takes a Vacation (1962), and The Dirty Dozen (1967). As a playwright he wrote the books for several Broadway musicals, including the musical revue Shoot the Works (1931), Arthur Schwartz's Park Avenue (1946), Bob Merrill's Henry, Sweet Henry (1967), and Jule Styne's Darling of the Day (1968). He also wrote the 1943 Broadway play The World's Full of Girls.

The Grapes of Wrath is a 1940 American drama film directed by John Ford. It was based on John Steinbeck's 1939 Pulitzer Prize-winning novel of the same name. The screenplay was written by Nunnally Johnson and the executive producer was Darryl F. Zanuck.