Watch: Celebrity Deaths: 2025's Fallen StarsNew details about Diane Keaton's death have emerged. The Oscar winner-who starred in films Annie Hall, Father of the Bride and Something's Gotta Give, among others, throughout her decades-long career-died at age 79 from pneumonia, her family confirmed to People Oct. 15. Diane's family added in a statement to the outlet, "The Keaton family are very grateful for the extraordinary messages of love and support they have received these past few days on behalf of their beloved Diane." She is survived by her two kids: Dexter, 29, and Duke, 25.