Jane Russell considered herself semi retired at this time and agreed to do a cameo for her friend Aaron Rosenberg.
Dorothy Malone did a cameo with Rod Taylor, during the pre-movie reviews, viewers wanted more of Dorothy, so they brought her back for another scene, but the credits had already been finished.
Although Ernest K. Gann, who wrote book on which film was based, later claimed he was reportedly so unhappy with film that he demanded his name be removed, his name does indeed appear in credits as author of source material.