The Lucky Dog (1921) is the first film to include Stan Laurel and Oliver Hardy together in a film before they became the famous comedy duo of Laurel and Hardy. Although they appear in scenes together, Laurel and Hardy play independently. Laurel is the star as the hero of the film and Hardy plays the main villain opposite him.

The film was screened as two reels, but some versions end abruptly after the first reel when Laurel is robbed by Hardy.