Stockard Channing

American actress Dinah Manoff was 21 years old when she rock n' rolled on the movie set of  "Grease" -- playing one of the iconic Pink Ladies, Martina Maraschino AKA "Marty" -- back in 1978. Dinah shared the big screen with Hollywood legends like John Travolta as the hot and suave leader of…

"Grease" star Stockard Channing has a lot to sing and dance about. Here's the 34-year-old as Rizzo back in 1978 (left) -- and 33 years later, the 67-year-old at an event in NYC on Thursday (right). Ageless is the word.