Growing up, Perrette wanted to be in a rock band or work for the FBI. Her role on NCIS in a way allowed her childhood ambitions to come to fruition ("Abby" seems like she would fit perfectly in a band if she weren't in a lab). As another fun fact, the actress worked with America's Most Wanted on a number of occasions.
Before landing her breakout role on NCIS, there was a time when Pauley did not have her trademark dark hair. Watch the video above to see her as a blonde and in a variety of hairstyles.