Who is credited with the screenplay for Gone With the Wind (1939)?

Sidney Howard is credited with the screenplay for Gone With the Wind (1939).

Whom did author Margaret Mitchell suggest to MGM to play Rhett Butler in Gone With the Wind (1939)? Groucho Marx was suggested to MGM to play Rhett Butler in Gone With the Wind, but only in jest.
In Gone With the Wind (1939), were the Atlanta Civil War scenes shot on location? No, the Atlanta Civil War scenes were not shot on location. Atlanta was built on the MGM studio back lot. Many of the burning buildings were recycled…
Who painted the backgrounds for Gone With the Wind (1939)? Fitch Fulton, father of special-effects man John P. Fulton, painted the backgrounds for Gone With the Wind (1939). There were about two hundred backgrounds all together.
Which movie epic is longer, Gone With the Wind (1939), or Heaven's Gate (1980)? Gone With the Wind is longer, by one minute. It runs 220 minutes. Heaven's Gate was originally shown at 219 minutes, but was later cut to 149…
Who is credited with the screenplay for Citizen Kane (1940)? Herman J. Mankiewicz and Orson Welles were credited with the screenplay for Citizen Kane (1940).
Who is credited with the screenplay for Casablanca (1942)? Julius J. and Philip G. Epstein and Howard Koch were credited with the screenplay for Casablanca (1942).