Tiffany Thiessen: 1974

Tiffany Thiessen landed several breakthrough roles when she was just a teen in the 90s, including spots on Beverly Hills 90210 and Saved by the Bell. With those two roles, she became an internationally famous star. That level of success was not enough for this go-getter; she continued taking on roles such as White Collar and Alexa & Katie.

She may not be as young as she was when she was filming 90210, but she has done very well with preserving her youth and beauty, as she does not look a day over 18. She will no doubt continue to grace the silver screen and beyond in the years to come.