Above is a clip from the original, unaired 1963 pilot for Gilligan’s Island, featuring Kit Smythe and Nancy McCarthy as Ginger and Bunny, respectively, the two single ladies aboard the SS Minnow, both of whom were secretaries. Of course, these characters were changed from two secretaries to a movie star and a small town girl, and recast with Tina Louise and Dawn Wells in the roles, forever giving rise to the eternal question; “Ginger or Mary Ann?” (and you can cast your vote here.)
As a footnote that isn’t in fitting with the theme of this site, but will be added nonetheless; the other change made to Gilligan’s Island once the show was picked up for a series, was replacing the high school science teacher character, who was in the pilot, with the Professor, along with a different actor in that role. The rest of the characters in the pilot were the same, and portrayed by the same actors, as in the TV series.
Hat tip to Rock Baker.