When Rhett pours Mammy a drink after the birth of Bonnie, for a joke during a take, Clark Gable actually poured alcohol instead of the usual tea into the decanter without Hattie McDaniel knowing it until she took a swig.
The fact that Hattie McDaniel would be unable to attend the premiere in racially segregated Atlanta outraged Clark Gable so much that he threatened to boycott the premiere unless she could attend. He later relented when she convinced him to go.
First color film to win the Academy Award for Best Picture.
At nearly four hours long, this has the longest running time of all motion pictures to win the prestigious Academy Award for Best Picture.