Was Jerry Siegel and Joe Shuster's inspiration for half of Superman's alter ego name Clark Kent ("Kent" came from Kent Taylor).
Watched very little television except boxing matches.
Well known for his pipe smoking, sustaining at least two bowlfuls a day. To this day he still has pipes named after him.
When he was born he was mistakenly listed as a female on his birth certificate.
When he was first cast in It Happened One Night (1934) opposite Claudette Colbert, he told director Frank Capra that he would give the role a shot, but if things weren't going well after a few days, he would leave the production.
When MGM remade Red Dust (1932) in 1953 as Mogambo (1953), Ava Gardner played the Jean Harlow part, Grace Kelly had the Mary Astor role, and Gable played his old part. Only Gable could fill Gable's shoes, even 21 years later.