The Slim Princess is a 1915 American silent comedy film directed by E. H. Calvert and starring Francis X. Bushman, Ruth Stonehouse and Wallace Beery.

The movie was written by Edward T. Lowe, Jr. from a story by George Ade and play by Henry Blossom, and was subsequently remade into a 1920 film starring Mabel Normand.

The farcical plot involves a princess of a fictional country, loosely based upon Turkey, in which obese women are prized and the normal-sized protagonist is widely regarded as being too slender.

[2] As described in a film magazine,[3] Alexander Pike, longing for new fields to conquer and willing to give a federal grand jury some time to forget him, takes a trip to Morovenia, where the ruling governor is desperate because Kalora, his oldest daughter, refuses to get fat enough to conform to the Turkish ideal of beauty and so be safely married off.

Then comes swift action, in which the fat and slim princesses become considerably mixed during the negotiations between the American and the governor, who cannot understand why any man could want a thin wife.