Family of Academy Award-Winning Actress Diane Keaton Reveal Cause of Death

Her family confirmed she died of pneumonia at the age of 79 on Oct. 11, surrounded by loved ones in California.

American Film Institute's 45th Life Achievement Award Gala Tribute to Diane Keaton at Dolby Theatre on June 8, 2017 in Hollywood, California. Charley Gallay/Getty Images

New details have emerged in the death of Oscar-winning actress Diane Keaton at the age of 79.

In a statement to People magazine, Keaton’s family confirmed she died of pneumonia on Oct. 11 in California, adding her health had declined “very suddenly.”