Gray hair came early for Reese Witherspoon if you believe the myth that it only belongs on "old" people's heads. However, if you're well-read, you'd know gray hair isn't limited to aging and can appear even on a newborn's body based on genetics.
Whatever the reason for hers appearing, Witherspoon has no problem embracing the new do. In fact, she welcomes it and has a cheerleader - her husband, Jim Toth - supporting her decision.