The Sad Sack is a 1957 American comedy film based on the Harvey Comics character of the same title, created by George Baker.

A Variety reviewer said that "the title, a hint of what the picture is about, and Jerry Lewis as star, communicate the message about this new Hal B. Wallis production.

[5] Harold Whitehead of The Montreal Gazette said that "fans of his particular brand of comedy will undoubtedly have a fine time watching this film".

On the other hand, Bosley Crowther of The New York Times had this to say: Those who remember Sad Sack, the cartooned G. I. of World War II whose troubles, as sketched by George Baker in Yank, were solace for many a soldier boy, will look in vain for that sweet character in the film that goes by his name and that came yesterday to Loew's State.

That is to say, he's Mr. Lewis in a standard rumpled Army uniform, blinking his eyes, creasing his mouth, scratching his noggin and generally behaving like a fool.

The only bit that reminded us remotely of Sad Sack is a fairly funny scene in which Mr. Lewis is put on "the couch" in the office of a Women's Army Corps psychiatrist.

For the rest, this loose-jointed service slapstick is a bundle of well-worn gags played around the forever fumbling G. I. who becomes the big hero in the clutch.