Olivia Newton-John and John Travolta bring back their iconic 'Grease' characters

For one night, it was 1978 again.

John Travolta and Olivia Newton-John recreated their iconic "Grease" characters , Danny and Sandy, on Friday night in West Palm Beach, Florida. The pair came to town for a sing-along of the movie and a Q&A session at the Coral Sky Amphitheatre.

It's the first time the two have been in costume since they first made the movie more than 40 years ago, Newton-John wrote on Instagram . Both actors posted a photo of their arrival at the event on Friday -- looking like they just stepped off the movie set.

Appearing in her "good girl" outfit, Newton-John is sporting her yellow skirt and matching cardigan, complete with the white button up.

Travolta, meanwhile, is wearing a classic leather jacket, with his hair slicked back in a way that would make any greaser proud.

But fans of Sandy's bad girl transformation at the end of the film have nothing to worry about. Newton-John made time for a quick outfit change, donning a leather jacket and black pants in time for the Q&A .

The throwback comes just days after a fan, after purchasing Newton-John's black leather jacket from the movie for $243,200 at a charity auction, presented the jacket back to the actress .

Her entire "bad girl" ensemble -- the skin-tight black leggings and jacket -- sold for $405,700 at an auction in November , with proceeds going to Newton-John's cancer wellness center in Australia.

The-CNN-Wire