Olivia Newton-John shared a special statement to PEOPLE about Kelly Preston's passing. Kelly was the wife of John Travolta, Olivia's famous Grease co-star. Olivia and John are very close friends, so it is no doubt that Olivia got to know Kelly very well.\r\n\r\nKelly died after a two-year private battle with breast cancer. Kelly and John met in 1987 while filming the movie The Experts. This was almost a decade after John filmed Grease.\u00a0\r\nOlivia Newton-John shares a statement about Kelly Preston's passing\r\n\r\n\r\nOlivia's statement read, "Kelly was a radiant, warm and gentle spirit \u2014 a loving, devoted wife, mother and sweet friend. My heart breaks for John, Ella and Ben. No words can express my sorrow for her family. Kelly\u2019s light shines on in her beautiful children."\r\n\r\nRELATED: John Travolta And Daughter Ella Pay Tribute Their Late Wife And Mother, Kelly Preston\r\n\r\n\r\n\r\nLast year, Kelly and John celebrated their 28th wedding anniversary. They both shared sweet sentiments on Instagram. Kelly wrote, "To my dearest Johnny, the most wonderful man I know. You have given me hope when I have felt lost, loved me patiently and unconditionally\u2026 made me laugh harder than any other human being possible\u2026 shared the most beautiful highs and at times low."\r\n\r\n\r\n\r\nShe continued, "You're a dream Daddio and make life so much fun!! I trust my love with you implicitly\u2026 with you I know I will always be okay no matter what happens\u2026 I love you forever and completely. Happy 28th Anniversary @johntravolta."\r\n\r\nDuring this time, Kelly was already in her private battle with breast cancer. It truly makes her post, especially "I will always be okay no matter what happens," very bittersweet.