Actors usually are required to have formal dramatic training or acting experience. Training can be obtained in acting conservatories, university programs, theatre-sponsored training programs, and independent dramatic arts schools. The National Association of Schools of Theatre accredits 135 colleges and universities that offer bachelor's or higher degrees in dramatic and theater arts. However, many reputable studio programs offer training on a course-by-course basis or that do not lead to a formal degree. Many professional actors who are between acting jobs obtain additional advanced training through private sessions with an acting coach or by participating in a master class to focus on a particular challenge or to broaden their skills.

Training in singing, dancing, or stage combat, or experience in modeling, stand up comedy, or acting in commercials is especially useful and helps an actor stand out among the many resumes being considered. But actual performance credits, even those for performing in local and regional theater productions, can be the most useful in getting into an audition. Many actors begin their career by performing in smaller markets and commercials and working as extras. Most professional actors rely on agents or managers to find auditions for them.