Stop-motion animation in no way is a new form of media in today’s era. We rarely see it used in recent films. Aside from the animation company Laika that brought us films like Kubo and the Two Strings, or as an affect in Disney’s Star Wars: The Force Awakens, revealing a brief shot using stop-motion animation.
The question left to wonder is when this style of animation was first introduced as a new form of media. Multiple sources on Google points to an animated short titled The Humpty Dumpty Circus. The film was made in 1897 by director J. Stuart Blackton along with Albert E. Smith. As the title suggests, it featured a circus with acrobats and animals which according to Smith, were actually his daughter’s circus dolls. There is no actual recording of the film to be found, nor are there any recorded details explaining what happened to the film. Only a few images of the film exist.
One other early example of stop motion animation heavily used in film, was the 1925 silent film The Lost World, animated by Willis O'Brien.