Here's Danny Zuko and Sandy Olsson from a little movie called Grease, ever heard of it? Paramount And here's Olivia Newton-John and John Travolta wearing their iconic Danny and Sandy costumes yesterday!!!!!! View this photo on Instagram instagram.com At first I thought, "I MUST be dreaming." Tap to play or pause GIF Tap to play or pause GIF Paramount But the good news is, this is 100% real, and according to Olivia, this is the FIRST time they've been back in costume since they filmed the movie — 41 years ago!!! Olivia Newton-John / instagram.com I'm excited too, Olivia! And people are freaking the frick out. instagram.com instagram.com instagram.com instagram.com Even Sara Blakely, the creator of Spanx, is excited! instagram.com It turns out the reunion is for an event called "Meet 'N Grease" happening this weekend in Florida, where there'll be a sing-a-long viewing of the movie and a super special Q+A with Olivia and John. iHeartRadio / Paramount So for reference, here's Danny and Sandy in 1978: Paramount And here's Danny and Sandy still looking pretty darn good in 2019: View this photo on Instagram instagram.com BRB, gotta go watch Grease now. Tap to play or pause GIF Tap to play or pause GIF Paramount What do you think about Olivia Newton-John and John Travolta's throwback moment? Tell us in the comments!