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John Travolta mourns Olivia Newton-John in heartbreaking post: 'Your Danny, your John'

Following the news that Olivia Newton-John had diedat the age of 73, her Grease co-star John Travolta told her As a tribute, he shared a heartbreaking message on Instagram.

Travolta, 68, shared a photo of Newton-John on his Instagram page. In the caption he wrote: Your impact has been incredible. i love you so much We will meet you on our way and we will be together again. Yours from the first moment I met you, and forever!

and To give Grease fans a little bit of grief, Travolta signed the message "Your Danny, your John!"

Travolta and Newton-John famously co-starred in the 1978 American musical romantic comedy film based on the 1971 musical of the same name. Danny Zuko and Sandy Olson's roles are the bad boys in Greaser, who fall in love during a summer fling, only to find out they attend the same school, which catapults both Travolta and Newton-John to stardom. A big influence on Hollywood and his teenage culture. You don't know true love until you see the love Danny and Sandy made.

There are also songs sung beautifully by Newton-John, but these songs have a habit of getting into your brain and not letting go. In his post, Travolta evokes the final refrain of "We Go Together," with him, Newton-John, and the entire cast singing, "We'll always be together."

Five years after him from Grease, Travolta and Newton-John reunited on screen in his 1983 romanceTwo of a Kind. Neither Travolta nor Newton-John appeared in the lesser-known sequel, Grease 2. Paramount + series Grease: Rise of the Pink Ladiesand prequel { .

Newton John's obituary shared by husband John Easterling,Facebookwrote on Monday: Southern California this morning surrounded by her family and friends. Please respect the family's privacy during this very difficult time," he wrote. He said: Her healing inspiration and her pioneering experience with botanical medicine continue with the Olivia Newton-John Foundation endowment dedicated to botanical medicine and cancer research. ''