If you thought they were just singing about 'Summer Loving' in legendary film Grease - you may be mistaken.
Film star Didi Conn revealed that the cast of the hit movie were - ahem - "horny all day long" in an interview on This Morning .
And Phillip Schofield and Holly Willoughby didn't quite know what to make of the information.
Speaking on the ITV daytime favourite on Monday, the 68-year-old actress who played Frenchie in the seventies musical, said that on-set, the cast would stay completely in character throughout. And we mean COMPLETELY in character.
"We were all a tad older than the characters we were playing - some even more than their 20s," Didi explained.
"So as soon as we got into the make-up chair I was Frenchie, there was Rizzo - it gave us the licence to be young, and horny, and spontaneous.
"We would stay in character all day long, which was great because that way we could just have fun!"
When a clearly surprised Phil dug a little deeper, the actress didn't hold back and confessed: "Bless our Kenickie's heart, his trailer was rocking and rolling all day long."
Grease suddenly has a whole new meaning thanks to Didi.
Aside from the riskier business, Didi did say that the cast remain in touch all these years later.
"In the movie we all said 'we'll always be together' and you know what, we have made friends that have lasted 40 years. It's crazy."
