Clark Gable (1901 - 1960) was an actor in the Golden Age of Hollywood. His three most famous roles are Peter Warne in It Happened One Night, Fletcher Christian in Mutiny on the Bounty and Rhett Butler in Gone with the Wind; all three earned him Academy Award nominations, and he won for It Happened One Night.
At one point he was Hollywood's top male box-office draw, second overall only to Shirley Temple. He was nicknamed "The King of Hollywood". Joe Shuster named Superman's alter-ego after Gable and fellow leading man Kent Taylor.
According to rumor, he's had another lasting imprint on pop culture: Bugs Bunny. There's a scene in It Happened One Night where his character is talking while chewing on a carrot. The Looney Tunes creators, being fans of the film, affectionately parodied this, and it became Bugs's famous "What's up, Doc?"