James Thurber's short story "The Secret Life of Walter Mitty" is published in The New Yorker, introducing the character to the world.
The first film adaptation of "The Secret Life of Walter Mitty" starring Danny Kaye is released, bringing the story to the big screen.
The modern film adaptation of "The Secret Life of Walter Mitty" directed by and starring Ben Stiller is released, revitalizing interest in the story.