1)
Memorize monologues. At most movie auditions, you will be asked to perform a monologue or two. This is your chance to display your flexibility an range as an actor. Choose monologues that fit your personality and acting style.
2) Get headshots. Headshots are often what get you in the door at a casting call. Hire a photographer with plenty of experience making headshots, which are quite different from regular portraits. Headshots are designed to display your personality type
3) Provide all requested materials to the casting director. You may be asked for a resume and cover letter in addition to your headshots and demo reel. You may be asked to bring these materials with you to the casting call or submit them beforehand.