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The first people that have the information are the hair and makeup ladies and the wardrobe people, because they often have to plan out the clothes: the things that are gonna get bloody, and the different kinds of gunshot wounds they're gonna have to do. They often have more of a preparation, more time, than we do. You can definitely feel on set the actors trying to get that information, and they're of sworn to secrecy.

Source: www.interviewmagazine.com
The first people that have the information are the hair and makeup ladies and the wardrobe people, because they often have to plan out the clothes: the things that are gonna get bloody, and the different kinds of