Walter Jackson Mitty is a daydreamer in James Thurber's first short story which was made into a film in 1947 starring Danny Kaye, with a remake in 2013 directed by, and starring Ben Stiller.
Walter Mitty (Kaye) is an "inconsequential guy from Perth Amboy, New Jersey". He is henpecked and harassed by everyone in his life including his bossy mother, his overbearing, idea-stealing boss Bruce Pierce, his dimwitted fiancée Gertrude Griswold, Gertrude's obnoxious would-be suitor Tubby Wadsworth and her loud-mouthed mother, Mrs. Griswold.
When both he and a colleague are about to lose their job, Walter takes action by embarking on an adventure more extraordinary than anything he could have ever imagined.