A cast member is:

• An actor who performs in a theatrical production, movie, or television program. These actors as a group are called the cast.
• Anyone who works at any of the Disney theme parks. These include the Disneyland Park in Anaheim, California and the Walt Disney World Resort. The use of this term comes from Walt Disney's use of theatrical terms when referring to park operations.
• Anyone who works at Chuck E. Cheese's, inspired by the Walt Disney Parks and Resorts term.