While fans were stunned by the sudden passing of Diane Keaton , the beloved actress had reportedly been secretly battling dementia for years, RadarOnline.com can reveal.

The Oscar winner died on October 11, and her family revealed four days later that her tragic passing was caused by pneumonia . Article continues below advertisement

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"She was battling it for years," a source close to the actress claimed to NewsNation.

It affected the star's ability to remember her lines, as the Hollywood icon allegedly needed to have her words fed to her through an earpiece in 2022 while filming the rom-com Maybe I Do .

"It was so sad," an on-set source claimed. "(Co-star) William H. Macy was very supportive, but it was al

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