The Blue Mouse () is a 1928 German silent comedy film directed by Johannes Guter and starring Jenny Jugo, Harry Halm, and Brita Appelgren. The film was distributed in Britain by Gaumont in a sound version. While the sound version had no audible dialog, it was released with a synchronized musical score with sound effects using both the sound-on-disc and sound-on-film process. It was shot at the Babelsberg Studios in Potsdam. The film's sets were designed by the art director Jacek Rotmil.
The sound version featured a theme song entitled âÂÂFanchon Waltzâ by Pat Heale (words) and Walter Collins (music).