In 2018, John Travolta appeared on The Tonight Show to celebrate the 40th anniversary of Grease and gave Fallon a formal lesson on the move, which he had suggested when the movie was filmed.

“Grease” co-stars and long-time friends Olivia Newton-John, 71, and John Travolta, 65, hosted an intimate “Meet n’ Grease” singalong and Q&A session with fans at the Coral Sky ...