The industry standard size for headshots is 8 x 10. Find a professional photographer (no glamour photographers). Typically headshots are done in black and white, however it is becoming popular to also submit color photos when auditioning. When you prepare to do headshots, do a few different "characters" (such as "girl next door," "businessman in a suit," etc.) to showcase different roles you can play. After choosing a few different poses, get a master copy from the photographer and reprint at least 100 of each shot.
A natural look is best when it comes to taking the perfect headshot. Casting directors want your appearance to seem effortless and attractive; having a casual conversation with the photographer or laughing will help you achieve this ideal look. You do not want your expression to look forced; the person seeing your photograph may think your acting will be similar. A thoughtful expression, a unique smile or a deep gaze will all catch the eye of the casting director.
Casting directors look for eyes that are unique and stick out. The eyes are the one feature that will be most noticeable to the casting director; they can be beautiful, unique or exactly right for a specific part. Your eyes can make or break the effectiveness of your headshot. If possible, the photographer may use special tools to enhance or define them for your picture; brightening them without overdoing it is the perfect way to draw them out.
Casting directors are drawn to photographs with the perfect lighting. These pictures are often the most flattering; keeping the lighting diffused for your headshot will help to generally enhance your appearance. A little bit of diffused light can greatly help the appearance of your skin by eliminating wrinkles and imperfections. It also adds a glow to the photograph by making it smooth and attractive. Keeping the lighting diffused everywhere except where you want definition, such as your eyes, will complete the photograph and perfect all your features.
Casting directors are looking for the right person for the right part. Get the perfect angle for your shot depending on what kind of a look you are going for. A shot taken from above tends to be more flattering; however, this shot may be more ideal for females than males. This angle makes cheeks look more defined and causes the eyes to look bigger. For males, shooting from down below can give a look of power and strength; however, shooting from too far down may cause the appearance of a double chin.