KEATON'S HEARTBREAKING DECLINE FROM DEMENTIA

Family kept it secret — even from friends

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William H. Macy and Diane shot Maybe I Do in early 2022

SHOCKING new details have emerged about the sudden death of beloved actress Diane Keaton — sources say she was secretly battling hereditary dementia in her final months and that the final downswing was so rapid and severe that even her closest friends didn't realize what was happening.

Although the family announced that the final cause of death on Oct. 11 at age 79 was from pneumonia, sources whisper that loved ones chose to keep the news of the Annie Hall Oscar winner's debilitating brain disease from the public.