Which actors and actresses are the most selective over their film roles?

In the performing arts industry such as theatre, film, or television, casting, or a casting call, is a pre-production process for selecting a certain type of actor, dancer, singer, or extra for a particular role or part in a script, screenplay, or teleplay. This process may be used for a motion picture, television program, documentary film, music video, play, or advertisement, intended for an audience.