WATCH: Olivia Newton-John opens up about her battle with cancer
Travolta played Danny Zuko and Newton-John played Sandy Olsson in the hit film which premiered in 1978.
Olivia was snapped sporting a look from the film which included a pleated yellow skirt and cardigan, while John wore his iconic leather jacket from the iconic movie.
She told the network that despite the obstacles, her outlook remains positive.
Olivia Newton-John has made a shock appearance with her Grease co star John Travolta.
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"I just want everyone to know, I'm here, I'm doing great," Olivia said.
"I'm doing really well and I'm really healthy," she continued.
"It was a challenging year because I broke my sacrum and I had to learn to walk again and everything. But I am strong and I am back and I'm feeling good and loving every minute."
Olivia made headlines after a 60 Minutes interview this year where she said her cancer is largely a psychological battle.
Olivia says her third battle with cancer is largely a psychological one.
“If somebody tells you, ‘You have six months to live,’ [it’s] very possibly you will because you believe that.”
“So for me, psychologically, it’s better not to have any ideas of what to expect.” The Grammy winner revealed her cancer diagnosis in November last year.
