After a two-year battle with breast cancer, the actress died on July 12. She was 57. Following the news, Kelly's husband John Travolta, posted a heartfelt message on Instagram, writing, "It is with a very heavy heart that I inform you that my beautiful wife Kelly has lost her two-year battle with breast cancer," he wrote alongside an image of Kelly. "She fought a courageous fight with the love and support of so many."