39. Darby Stanchfield
Darby Stanchfield shot to fame with her back to back appearances in hit shows like Bones, Cold Case, Monk, That ‘80s Show, and Mad Men. The actress appeared in NCIS for a single season only as Shannon. However, she hasn’t been idle for a day as she is still working on several shows and movie projects. Her stricts diet and workout routine immensely helps her look ageless.