The producers pitched the series to ABC as a relatively straightforward buddy comedy in the spirit of Billy Wilder's comedy films. When they used the film Some Like It Hot (1959) as an example, the network agreed to the series, but only if the main characters were disguised as women. Although the producers had to change the series quickly, they were able to produce it with little network creative interference.
In an interview in TV Guide, Donna Dixon explained how she landed the role of Sonny, her acting debut. She knew that as an unknown she would be competing against a lot of women. To stand out, she wore a bright red tracksuit to the audition.