John Travolta, Dionne Warwick and more remember Olivia Newton-John

Celebrities flocked to social media with personal anecdotes and photos to remember Olivia Newton-John, the Australian actress and pop singer who died Monday at 73.

Best known for 1978’s “Grease,” as well as her robust musical career, Newton-John spent her later years advocating for cancer research.

Newton-John was first diagnosed and treated for breast cancer in 1992. She was in remission until 2013, when the disease returned, and years later announced it had metastasized to her spine. 

A family statement posted Monday afternoon to Newton-John’s Facebook page emphasized how open she was about her breast cancer journey. It described her as a “symbol of triumphs and hope for over 30 years.”

That very sentiment echoed across social media. John Travolta, who played Danny Zuko opposite Newton-John’s Sandy Olsson in “Grease,” shared a photo on Instagram in honor of his “dearest Olivia.”

“Your impact was incredible,” he wrote. “I love you so much. We will see you down the road and we will all be together again. Yours from the first moment I saw you and forever! Your Danny, your John!”

Barbra Streisand, who once featured on Newton-John and Travolta’s Christmas album, posted an old photo to Instagram of herself alongside Newton-John and singer and record producer Lou Rawls.

“Too young to leave this world. May she RIP,” Streisand wrote in the caption, adding a tearful emoji.