Louis Aimé Augustin Le Prince (French: [lwi l(ə) pʁɛ̃s]; 28 August 1841 – disappeared 16 September 1890; declared dead 16 September 1897) was a French artist and the inventor of an early motion-picture camera, and director of Roundhay Garden Scene. He was possibly the first person to shoot a moving picture sequence using a single lens camera and a strip of (paper) film. He has been credited as the "Father of Cinematography" but, due to his disappearance in 1890, his work did not influence the commercial development of cinema.

In October 1888, Le Prince filmed moving-picture sequences of family members in Leeds, in the 1888 short film Roundhay Garden Scene, and of his son Louis playing the accordion, using his single-lens camera and Eastman's paper negative film. In the next eighteen months, he also made a film of Leeds Bridge. His work appears to precede the inventions of his contemporaries, such as Friese-Greene and Donisthorpe as well as being years ahead of the Lumière brothers and Dickson (who did the moving image work for Thomas Edison). Le Prince disappeared on 16 September 1890. Numerous conspiracy theories emerged about his disappearance, including murder, disappearance in order to start a new life, and suicide. However, no conclusive evidence was found for any of these theories.

In early 1890, Edison workers had begun experimenting with celluloid film to capture moving images. The first public results of these experiments were shown in May 1891. Le Prince's widow and son, Adolphe, were keen to advance Louis's cause as the inventor of cinematography. In 1898, Adolphe appeared as a witness for the defence in a court case brought by Thomas Edison against the American Mutoscope Company, in which Edison claimed to be the first and sole inventor of cinematography, and thus entitled to royalties for the use of the process. Film shot with cameras built according to Le Prince's patent were presented. Eventually, the court ruled in Edison's favour, however, a year later that ruling was overturned, but Edison reissued his patents and succeeded in controlling the US film industry for many years.

Seven years after his disappearance, Le Prince was declared dead on 16 September 1897.

Le Prince was born on 28 August 1841 in Metz. His family referred to him as "Augustin" and English-speaking friends would later call him "Gus". Le Prince's father was a major of artillery in the French Army and an officer of the Légion d'honneur. When growing up, he reportedly spent time in the studio of his father's friend, the pioneer of photography Louis Daguerre, from whom Le Prince may have received some lessons on photography and chemistry before he was 10 years old. His education went on to include the study of painting in Paris and post-graduate chemistry at Leipzig University, which provided him with the academic knowledge he was to utilise in the future.

In conclusion, I would say that Mr. Le Prince was in many ways a very extraordinary man, apart from his inventive genius, which was undoubtedly great. He stood 6ft. 3in. or 4in. (190cm) in his stockings, well built in proportion, and he was most gentle and considerate and, though an inventor, of an extremely placid disposition which nothing appeared to ruffle.

— Declaration of Frederic Mason (wood-worker and assistant of Le Prince, April 21, 1931, American consulate of Bradford, England)

Le Prince moved to Leeds, England in 1866, after being invited to join John Whitley, a friend introduced by a former university lecturer, in Whitley Partners of Hunslet, a firm of brass founders making valves and components. In 1869 he married Sarah Elizabeth Whitley, John's sister and a talented artist. When in Paris during their honeymoon, Le Prince repeatedly visited a magic show, fascinated by an illusion with moving transparent figures, presumably a dancing skeleton projection at the Théâtre Robert-Houdin with multiple reflections of mirrors focused on one point or a variation of Pepper's Ghost.