A tragic loss has left the world mourning the passing of beloved actress Diane Keaton, who died at 79. New details have emerged, shedding light on her sudden and rapid health decline. A close friend revealed to People that her deterioration was swift and unexpected, leaving those who loved her heartbroken. Even long-time friends were unaware of her condition, emphasizing the shock of her passing. Diane's withdrawal from her daily walks with her dogs and the listing of her Los Angeles home for sale in March further hinted at her deteriorating health. While the exact cause of death remains undisclosed, Diane had openly discussed her struggles with skin cancer and an eating disorder. She attributed her family's history of skin cancer to her own battle with the disease, emphasizing the importance of sun protection. In her memoir, Then Again, Diane bravely shared her battle with bulimia during her twenties, showing her resilience and vulnerability. The actress' career began in the 1960s with the Broadway production of Hair, and she quickly gained recognition for her performances in Woody Allen's Play It Again, Sam, for which she was nominated for a Tony Award. Diane's collaborations with Allen continued, and she won an Academy Award for Best Actress for her role in Annie Hall. Her early career also included a memorable performance in The Godfather, which she reprised in the sequels. Diane's talent and versatility were celebrated by her peers, with Reese Witherspoon, Bette Midler, and Steve Martin expressing their sadness over her passing. Longtime friend Goldie Hawn penned an emotional tribute, highlighting Diane's enduring impact and the void her absence will leave. As the world mourns, the actress' loved ones request privacy during this difficult time.