Sondra Locke's film debut.

Montgomery Clift was approached to play Singer (Alan Arkin's character) in an early 1960s version that never got off the ground.

Joseph Strick dropped out of the film as director early in the production and was replaced by Robert Ellis Miller.

Mary Badham tested unsuccessfully for the role of Mick.

Comedian Jackie Vernon was initially cast in role ultimately played by Chuck McCann.

Unable to find white suits large enough to fit Chuck McCann, costumers had him wear old suits previously worn by studio character actor Sydney Greenstreet.