Principal roles are roles that have dialogue. They also are called speaking roles and are usually won through an audition process. Most actors have training in their craft. While the occasional principal role is cast from MyCastingFile, most actors have agents who send them on auditions for appropriate roles. To book a principal role in a nutshell (and in this order): training, confidence, headshots, resume, agent, audition, audition again, another audition, don’t give up, booking…