The Shaggy Dog is a 1959 American fantasy comedy film produced by Walt Disney Productions and loosely based on the 1923 novel The Hound of Florence by Felix Salten. Directed by Charles Barton from a screenplay by Lillie Hayward and Bill Walsh, the film stars Fred MacMurray, Tommy Kirk, Jean Hagen, Kevin Corcoran, Tim Considine, Roberta Shore, and Annette Funicello. The film follows a teenage boy named Wilby Daniels who, by the power of an enchanted ring of the Borgias, is transformed into a shaggy Old English Sheepdog.

The film was released on March 19, 1959, and grossed over $9 million during its initial release, making it the second-highest-grossing film of 1959. Its successes spawned a franchise thereafter including: a sequel The Shaggy D.A. (1976), starring Dean Jones, Tim Conway, and Suzanne Pleshette. It was followed by a 1987 television sequel, a 1994 television remake and a 2006 theatrical live-action remake.