1978:  Left to right: actors Jeff Conaway, Olivia Newton-John, John Travolta and Stockard Channing walk arm in arm at a carnival in a still from the film,
1978: Left to right: actors Jeff Conaway, Olivia Newton-John, John Travolta and Stockard Channing walk arm in arm at a carnival in a still from the film, 'Grease' directed by Randal Kleiser. (Photo by Paramount Pictures/Fotos International/Getty Images)
PHOTO: Fotos International/Moviepix/Getty Images
Now playing
00:49
Actors recreate iconic 'Grease' characters decades later
PHOTO: JoJo Siwa / TikTok
Now playing
01:31
See JoJo Siwa's unique coming out announcement
PHOTO: CNN
Now playing
00:48
Larry King signs off CNN: Instead of goodbye, so long
Now playing
01:16
Sen. Patrick Leahy doubles as a Batman actor
bernie mittens senator sanders inauguration viral fashion moos pkg ebof vpx_00002005.png
bernie mittens senator sanders inauguration viral fashion moos pkg ebof vpx_00002005.png
PHOTO: Twitter/@MinnesotaMemes
Now playing
02:18
Bernie Sanders' 'grumpy chic' style steals show at inauguration
PHOTO: Medical Park Hospital
Now playing
01:02
Loyal dog waits outside a hospital for her owner
PHOTO: NFL/Twitter
Now playing
01:16
NFL surprises health care workers with Super Bowl tickets
Now playing
01:38
Dakota Johnson discusses what playing a dying woman taught her
PHOTO: TheImageDirect.com
Now playing
02:10
Life-size cutout of Ben Affleck's ex trashed after their breakup
Serena Williams w/ daughter Olympia
Serena Williams w/ daughter Olympia
PHOTO: @SerenaWilliams
Now playing
00:43
Tennis legend's daughter joins her on the court
PHOTO: Maurice Kervin
Now playing
01:45
Watch this snowboarder survive an avalanche in Colorado
PHOTO: ABC / "Good Morning America"
Now playing
01:52
Jacob Blake tells GMA 'I didn't want to be the next George Floyd'
Donald Trump with Macaulay Culkin in a scene from Home Alone 2.
Donald Trump with Macaulay Culkin in a scene from Home Alone 2.
PHOTO: 20th Century Fox
Now playing
02:09
Actor applauds editing out Trump's 'Home Alone 2' cameo
Now playing
01:52
Chadwick Boseman's widow gives tearful speech at tribute
hawaii dome fountain
hawaii dome fountain
Now playing
01:07
Surreal 'dome fountain' of lava bubbles up in Hawaii
Lucille Ball Moos pkg 0112
Lucille Ball Moos pkg 0112
PHOTO: Getty Images/Desilu Productions
Now playing
02:29
Internet has a lot to say about Nicole Kidman's Lucille Ball role
(CNN) —  

For one night, it was 1978 again.

Olivia Newton-John and John Travolta reunite for a "Grease" sing-along in West Palm Beach, Florida.
Olivia Newton-John and John Travolta reunite for a "Grease" sing-along in West Palm Beach, Florida.
PHOTO: Alberto E. Rodriguez/Getty Images

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.