Olivia Newton-John and John Travolta dress up as their iconic 'Grease' characters 41 years later

We've got chills and they're multiplying after seeing Olivia Newton-John and John Travolta dress up as their beloved characters from Grease for the first time in over 40 years!

That's right. It was 1978 again for one night as the duo - who played Danny Zuko and Sandy Olsson - donned their famous outfits from the show for a special 'Meet 'N Grease' movie sing-along event in Florida over the weekend.

During the fan event, the pair wore a number of different looks from the musical, including Sandy's "good girl" outfit, made up of a yellow skirt and matching cardigan, complete with a white button-up shirt.

"First time in costume since we made the movie! So excited!!" Olivia wrote on social media.

While John stayed true to his T-Birds roots in an all-black ensemble with a leather jacket.

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Later on during a Q&A with fans, the 71-year-old Australian singer changed into a leather jacket and tight black leggings reminiscent of her finale look from the movie.

Taking to Instagram, John shared a series of photos from backstage at the event.

"#Grease is still the word," the 65-year-old actor wrote alongside the images.

The throwback comes just days after a fan, who purchased Olivia's black leather jacket from the movie at a charity auction, presented the jacket back to the actress.