Olivia Newton-John recalls first on-screen kiss with John Travolta

Newton-John recalls 'lovely' details of her first kiss with John Travolta on set while filming 'Grease' in 1978. Photo / Milos Vujinovic/SOPA Images/LightRocket/Getty Images

Olivia Newton-John, who played the lead role of Sandy in the 1978 musical film, Grease, has recalled her experience kissing John Travolta, who played Danny, on screen for the first time.

The 72-year-old actress recalls that the on-screen couple locked lips on the very first day of filming and she still has vivid memories of the experience.

She shared: "It was at the beach - actually the opening scene of the movie.

"It was a beautiful day. We were playing around in the water, and I don't really remember exactly, but it was a very lovely day and an exciting moment because it was the start of the film, although everything was kind of out of order, but we did that. That was the first time we had kissed."

Newton-John starred with John Travolta in classic favourite musical film, Grease, in 1978. Photo / supplied

Newton-John and her co-star barely knew each other when they first kissed.

And although they're now close friends, she admitted to feeling anxious about their smooch.

She told Us Weekly: "I was nervous of course.

"I remember just before that we were sitting on a rock and it's actually in the movie that these waves broke over us. These rogue waves came in. And I can't remember if that was before or after that because my hair was perfect. So maybe it was after that.

"But it was a very special day and it was really a nice way to get to know John a little bit because we hadn't spent all that much time together. We had some rehearsal time and dance time and stuff, but this was our first acting day."

Although initially 'nervous' to kiss Travolta on the first day of filming for Grease in 1978 the on-screen couple have been close friends ever since. Steve Granitz / Getty Images

Despite her nervousness, Newton-John still has fond memories of the day, describing it as "lovely" and "special".

The actress shared: "It was lovely. It was special. And I can't remember exactly everything 'cause it's over 40 years ago."