Charlotte "Lotte" Reiniger (2 June 1899 – 19 June 1981) was a German film director and the foremost pioneer of silhouette animation. Reiniger made more than 40 films over her career, all using her invention. Her best-known films are The Adventures of Prince Achmed (1926) – the oldest surviving feature-length animated film, preceding Walt Disney's feature-length Snow White and the Seven Dwarfs (1937) by over ten years – and Papageno (1935), featuring music by Mozart. Reiniger is also noted for devising a predecessor to the first multiplane camera.
As a child, she was fascinated with the Chinese art of silhouette puppetry, even building her own puppet theatre, so that she could put on shows for her family and friends.
Reiniger enrolled in the acting group to which Wegener belonged, the Theatre of Max Reinhardt. She began by making costumes and props and working backstage. She started making silhouette portraits of the various actors around her, and soon she was making elaborate title cards for Wegener's films, many of which featured her silhouettes.
Reiniger, in devising the predecessor to the first multiplane camera for certain effects, preceded Walt Disney and Ub Iwerks by a decade. Above her animation table, a camera with a manual shutter was placed in order to achieve this. She placed planes of glass to achieve a layered effect. The setup was then backlit. This camera setup was later popular in cell animation.
Reiniger had a distinct art style in her animations that was very different from other artists in the time period of the 1920s and the 1930s, particularly in terms of characters. In the 1920s especially, characters tended to rely on facial expressions to express emotions or action, while Reiniger's characters relied on gestures to display emotions or actions. She also utilized the technique of metamorphosis often in her animations. This focus on transformation greatly benefits her tendency to work with fairytale stories.