One11 is a 1992 monochrome art film by John Cage and Henning Lohner. It is the only feature-length film production Cage was ever involved in. The film has no plot and consists of black-and-white images depicting a composed and chance-determined play of electric light. It can be accompanied by the orchestra piece 103. Described as "film without subject" and "abstract study in light and shade", it was completed in 1992 only weeks before Cage's death.

One11 has garnered acclaim from film and music critics alike. Hailed for its dream-like, meditative quality as well as its striking visuals and sounds, the film originally aired on German television and has been presented at various theatrical venues and exhibitions since its premiere in September 1992.