Thomsen, Brian M. "A Night on the Plantation"
Divergence: 1936 CE
What if: Instead of script approval, David O. Selznick let Margaret Mitchell pick the lead actor for Gone With the Wind.
Summary: Mitchell doesn't like Clark Gable, and after an argument with the studio picks Groucho Marx to play Rhett Butler.
Published: In By Any Other Fame (eds. Mike Resnick and Martin H. Greenberg), q.v.