August 16, 2018 08:31 AM

They go together.

At a 40th anniversary screening of Grease at the Samuel Goldwyn Theater in Beverly Hills on Wednesday, Olivia Newton-John and John Travolta proved they are still hopelessly devoted to each other after all these years.

Newton-John, 69 — Grease‘s good girl Sandy — wore a pink shirt, matching sneakers, and a white suit for the landmark occasion. Travolta — T-Bird Danny Zuko — sported jeans, a black blazer, and a gray beard. The iconic onscreen couple even showed off their dance moves for photographers.

Newton-John and Travolta
Alberto E. Rodriguez/Getty Images
Newton-John and Travolta
Jon Kopaloff/FilmMagic

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Didi Conn, who played beauty school dropout Frenchy, Barry Pearl, who starred as T-Bird Doody, and Randal Kleiser, who directed the 1978 hit, also attended the event. Both Conn, 67, and Pearl, 68, made appearances in Grease: Live in 2016.

The cast and director of Grease
Steve Granitz/WireImage

In PEOPLE’s recent Grease! 40th anniversary special edition, the cast discussed the film that cemented their place in movie history.

“We did something life-changing, making that film,” Newton-John told PEOPLE about her enduring friendship with Travolta. “[At the premiere] you got the feeling from the energy that something was happening. It was a huge response. I feel grateful to be a part of that and to have worked with him. We’ve stayed friends ever since.”

RELATED VIDEO: 40 Years After Grease, John Travolta and Olivia Newton-John Open Up about Their Friendship Through Good Times and Bad: ‘We Have a Bond’

People’s new Grease special edition, filled with on-set secrets, cast interviews and more from Travolta and Newton-John, is available now on Amazon and wherever magazines are sold.

“When you share that kind of meteoric success—and nothing has been able to exceed it—you share a bond,” added Travolta, who still texts with Newton-John. “I’ve been through her having a child, getting divorced, losing her sister. She’s been through my getting married, having children. It’s wonderful and full of shared memories.”

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Travolta, 64, recently revisited his iconic role when he taught Jimmy Fallon how to do a “You’re the One That I Want” hip thrust on The Tonight Show.

Grease changed people’s lives emotionally,” Travolta noted to PEOPLE. “It inspired people to become performers, it marked people falling in love — I know it by the letters I get and encounters I have.”

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