Up the Sandbox is a 1972 American comedy-drama film directed by Irvin Kershner, with a screenplay by Paul Zindel, based on the novel of the same name by Anne Roiphe. The film stars Barbra Streisand as Margaret Reynolds, a young wife and mother in Manhattan, who slips into increasingly bizarre fantasies to escape the predicament of her pregnancy. The film's supporting cast includes David Selby, Paul Benedict, George S. Irving, Conrad Bain, Isabel Sanford, Lois Smith and Jacobo Morales as a character who closely resembles Fidel Castro.