 Former Disney young star Tommy Kirk was signed for the film, presumably in the role of Bud Elder, but his arrest for being at a party where marijuana was used led to his being fired from the production.The name "Kate Elder" was one of several names used by Mary Katherine Horony Cummings, better known as "Big Nose Kate", a western icon and sometime companion of dentist / gambler / gunfighter Doc Holliday.As Holliday's Kate Elder lived until 1940, she cannot be the Katie Elder mentioned in this film.