An emotional Travolta paid tribute to his “Grease” co-star Olivia Newton-John at the Oscars in 2023. Newton-John, who played Australian teen Sandy Olsson in the movie, died of cancer in 2022. Thank you for reading. Please consider supporting NJ.com with a subscription.

John Travolta gave "Grease" fans the thrill of their lives when he dressed up as Danny Zuko for a surprise appearance at a screening of the hit 1978 movie musical. The 71-year-old actor shared a pic on Instagram that showed him wearing a leather jacket and a slicked-back pompadour to make a cameo at a June 27 "Grease" sing-along at the Hollywood Bowl in Los Angeles.