Diane Keaton is reported to have died at the age of 79 on October 11, 2025, in California. Her death followed a sudden and severe decline in her health. The exact cause of her death has not been publicly disclosed, and her family has chosen to keep details private. Her health deterioration was unexpected, even for those close to her, and in her final months, she was surrounded only by her closest family. There is no specific cause of death mentioned in the available information so far.