This is really important because, especially if you're a girl, different hair styles lead to different perceptions of you. Not only that, but they give you more range.
Remember what I have said in the past: most casting directors won't use their imaginations. Headshots need to show the exact look that you are going for, so you need to really play with your hair to emphasize the type of character you are going for.
If you're a guy, try your hair in a few different styles, like parted, messy, or spiked, depending on which look you are currently going for. If you're a girl, try it down, up, curled, straight, and in any other way you think of. The more looks you have, the better off you'll be because you'll have a lot of headshots to choose from.
Hair is really important, you just need to know that if you change your hair in a permanent way, you have to get new headshots. By permanent, I mean anything that you can't change at a whim.
So to sum it up, be sure to mess around with your hair and try different styles. Know which ones you will want to use at your headshot session before you come.
Hey I'm Martin, and my goal is to help you reach yours. I love writing content about career advancement, marketing strategies, productivity, and much more.