One of a Kind
This is an interesting fact that may not occur to many people, but it makes complete sense. As we’ve all gathered by now, Disney takes the creation of their magic kingdom very seriously and they pull it off so well because of their attention to detail. One such detail is that you will never see more than one cast member playing the same character out in the park at the same time.
After all, there’s technically only one Snow White existing in the Disney universe, right? Seeing a double of a Disney Princess in another part of the park would seem pretty surreal and strange. Having only one actor play a given character also extends to adult visitors. Adult guests are not allowed to enter the park dressed as a Disney character in order to minimize distractions and keep up the illusion of the Disney universe.