Choice For Gilligan
A rumor that seemed to spread like wildfire was that the producer wanted Alan Young to play Gilligan. Actor Alan Young is most famous for playing Wilbur Post on the show Mister Ed. Years later, Sherwood Schwartz cleared up any confusion. Schwartz insisted he had no clue where that came from since he never considered Alan Young at all.
No Need For Kids
At first, they thought of using a child actor to play the Professor’s nephew. However, they decided against this because of one element of the show. Apparently, they sculpted Gilligan to be childlike at heart, so Gilligan’s Island did not need a child actor.