There is no specific rule for what an actor should wear to an audition, unless the casting director insists that actors dress in a specified attire. However, it is usually good for an actor to "dress the part", meaning, the actor should wear clothing that connects him or her to the role they are auditioning for. For example, if an actor is auditioning for the role of a police officer, it might be a good idea to show up to the audition wearing a police shirt, badge and hat.

    Dressing the part makes it easier for a casting director to imagine the actor performing that role in the production. That, of course, increases the odds of success for the actor.
   
    If an actor is auditioning for a role that doesn't have any obvious attire, or the actor is auditioning for multiple roles, the actor should keep certain things in mind:

• Actors should try to minimize the amount of jewelry they wear
• Actors should try to cover up outstanding piercings and tattoos, unless they fit the role the actor is auditioning for.
• Actors should not wear "loud" clothing, such as extremely bright colors, patterns and designs, unless it fits the role the actor is auditioning for.
• Actors should not wear white, especially when the audition is an on-camera audition.