From Entertainment Weekly, June 18, 2010 – John Travolta was 23 years old and had just been cast as Danny in the film adaptation of the popular stage musical Grease when he told his producers whom they should hire as Sandy. But Olivia Newton-John, a successful recording artist with limited acting experience, was unsure about playing a high school student. ”I was 29 and worried that I didn’t look young enough,” she says. Then Travolta visited her at her home, and there went her reservations. ”John and I had great chemistry from the first time we met,” she says. ”We’re bonded forever on celluloid.”

Grease, the raunchy-sweet 1950s-set musical, remains one of the most beloved movies of all time. Released in June 1978, it grossed $160 million and spawned a chart-topping soundtrack of enduring tunes. Singing, dancing, and swooning teens — it may be the perfect summer movie. ”I don’t think we ever imagined it would become so popular and go for so long,” says Newton-John, 61, who recently guest-starred on Glee and will appear in a cancer-awareness documentary, 1 a Minute, this fall. ”But every seven years or so, a new group of kids finds the movie.” And starting July 8 in 13 markets (and more if enough people request it via the online service Demand it!), Paramount is releasing Grease: Sing-A-Long, a studio-sanctioned version of the audience-participation screenings that fans have been organizing for years.”