John Travolta is taking the time to remember his late “Grease” costar.

Olivia Newton-John passed away on Monday, according to her husband.

A rep did not disclose her cause of death, however, they did put out a statement:

“After a 30-year cancer journey, she lost her battle to metastatic breast cancer.”

John Travolta shared an old photo of her on Instagram.

“My dearest Olivia, you made all of our lives so much better,” he wrote.

“Your impact was incredible,” he went on. “I love you so much.”

“We will see you down the road and we will all be together again,” he continued.

“Yours from the first moment I saw you and forever!” he concluded. “Your Danny, your John!”