What Was the Cause of Death of Legendary Actress Diane Keaton?

At first, her inner circle chose not to share many details

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Diane Keaton, one of Hollywood’s most beloved icons, has passed away.
The actress died on October 11, 2025, leaving fans and colleagues heartbroken. At first, her inner circle chose not to share many details, explaining that “the family asks for privacy during this difficult time.”

Days later, her relatives released a statement through PEOPLE magazine confirming that complications from bacterial pneumonia led to her passing. “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,” the note read.

According to the family, her death was completely unexpected and deeply painful. In recent months, Diane had been surrounded only by her closest loved ones, keeping her health struggles mostly private — even from some longtime friends.

People also obtained her death certificate, which listed bacterial pneumonia as the primary cause of death, with no other contributing conditions. It was further confirmed that she was cremated on October 14.

Songwriter Carole Bayer Sager, a close friend of Keaton’s, shared that she had seen Diane just a few weeks earlier and noticed she looked “very thin,” something that raised concerns about her health. Other sources say her condition worsened suddenly in recent months — a shock to many who had always known her as full of life and energy.

The Legacy of Diane Keaton

As tributes pour in, AMC Theatres announced plans to celebrate her legacy by re-releasing two of her most iconic films — Annie Hall and Something’s Gotta Give — in select theaters starting October 17, according to the company’s social media post.

Diane Keaton’s impact went far beyond her performances on screen. She became a symbol of authenticity, challenging stereotypes about women in Hollywood and defining a unique personal style that influenced generations. Her career was filled with unforgettable roles in classics like The Godfather, Baby Boom, and Book Club, among many others.

Even though she’s no longer with us, her humor, warmth, and one-of-a-kind spark will continue to shine through every story she left behind.