The Adding Machine is a 1969 British fantasy comedy drama film produced, written, and directed by Jerome Epstein and starring Milo O'Shea, Phyllis Diller, Billie Whitelaw, Sydney Chaplin, and Raymond Huntley. It is based on a stage production of the 1923 Elmer Rice play The Adding Machine directed by Jerome Epstein in Los Angeles in the 1940s. It was shot at Shepperton Studios outside London. The film's sets were designed by the art director Jack Shampan. It was distributed in the United Kingdom by Universal Pictures.