Collage film is a style of film created by juxtaposing found footage from disparate sources. The term has also been applied to the physical collaging of materials onto film stock.

The surrealist movement played a critical role in the creation of the collage film form. The American artist Joseph Cornell produced one of the earliest collage films with his reassembly of East of Borneo, combined with pieces of other films, into a new work he titled Rose Hobart after the leading actress. When Salvador Dalí saw the film, he was famously enraged, believing Cornell had stolen the idea from his thoughts. But Adrian Brunel made, twelve years before, Crossing the Great Sagrada (1924) and Henri Storck conceived, for years earlier, Story of the Unknown soldier (Histoire du soldat inconnu) (1932.

The idea of combining film from various sources also appealed to another surrealist artist André Breton. In the town of Nantes, he and friend Jacques Vaché would travel from one movie theater to another, without ever staying for an entire film.

A collage (From the French: à coller, to glue, French pronunciation: [kɔ.laːʒ]) is a work of formal art, primarily in the visual arts, made from an assemblage of different forms, thus creating a new whole.

A collage may sometimes include newspaper clippings, ribbons, bits of colored or hand-made papers, portions of other artwork or texts, photographs and other found objects, glued to a piece of paper or canvas. The origins of collage can be traced back hundreds of years, but this technique made a dramatic reappearance in the early 20th century as an art form of novelty.

The term collage derives from the French "coller" meaning "glue". This term was coined by both Georges Braque and Pablo Picasso in the beginning of the 20th century when collage became a distinctive part of modern art.

Techniques of collage were first used at the time of the invention of paper in China, around 200 BC. The use of collage, however, remained very limited until the 10th century in Japan, when calligraphers began to apply glued paper, using texts on surfaces, when writing their poems.

A film, also called a movie or motion picture, is a series of still or moving images. It is produced by recording photographic images with cameras, or by creating images using animation techniques or visual effects. The process of filmmaking has developed into an art form and industry.

Films are cultural artifacts created by specific cultures, which reflect those cultures, and, in turn, affect them. Film is considered to be an important art form, a source of popular entertainment and a powerful method for educating – or indoctrinating – citizens. The visual elements of cinema give motion pictures a universal power of communication. Some films have become popular worldwide attractions by using dubbing or subtitles that translate the dialogue into the language of the viewer.

Films are made up of a series of individual images called frames. When these images are shown rapidly in succession, a viewer has the illusion that motion is occurring. The viewer cannot see the flickering between frames due to an effect known as persistence of vision, whereby the eye retains a visual image for a fraction of a second after the source has been removed. Viewers perceive motion due to a psychological effect called beta movement.