Diane Keaton’s Cause of Death and Her True Love at 79

Diane Keaton had a way of making eccentricity feel natural, winning the Academy Award for Best Actress for Annie Hall and continuing to appear on screen decades later with an unmistakable voice and wardrobe. On October 11, 2025, she died at 79 from primary bacterial pneumonia, confirmed by The New York Times and PEOPLE.

Born: Jan. 5, 1946 · Died: Oct. 11, 2025 · Age: 79 · Cause: Primary bacterial pneumonia · Children: 2 (Dexter and Duke) — as reported by The New York Times, PEOPLE, and NPR.

Diane Keaton at a Glance

The table below gathers the key details from the public record and the reporting around her death.

When Did Diane Keaton Die, and What Was the Cause?

What the official record shows

• Date of death: October 11, 2025 (The New York Times)
• Age at death: 79 (The New York Times)
• Cause on death certificate: primary bacterial pneumonia (The New York Times; PEOPLE)

According to The New York Times, initial reports did not specify a cause. The paper later reported that Keaton’s death certificate listed primary bacterial pneumonia. PEOPLE independently confirmed the same cause.

Where was Diane Keaton found when she died?

Official reports did not specify the location of her death, only that she died on October 11, 2025.

Diane Keaton’s Children: Dexter and Duke

Adoption, not birth

• Two children: Dexter and Duke (NPR)
• Both children were adopted (NPR)
• Duke joined the family five years after Dexter (NPR)

Did Diane Keaton have a baby at 50?

No. She adopted both children. She adopted her daughter Dexter at age 50 and later adopted Duke.

NPR reported that Keaton adopted her son Dexter and later adopted Duke. Despite the recurring question about whether she gave birth, her children were adopted.

Diane Keaton and Al Pacino: A Complicated Love Story

On and off for decades

• Keaton and Pacino never married (Vogue)
• Vogue described Pacino as one of three long relationships, alongside Warren Beatty and Woody Allen (Vogue)
• Keaton was not married at the time of her death (Vogue)

Who were Diane Keaton’s lovers in real life?

Her most famous relationships were with Al Pacino, Warren Beatty, and Woody Allen, though she never married.

Vogue wrote that Keaton had long relationships with Warren Beatty, Al Pacino, and Woody Allen but never married. Her bond with Pacino was one of the most visible threads of her private life, and it remained on and off for decades.

What’s Confirmed — and What’s Still Unclear

Confirmed

• Diane Keaton died on October 11, 2025, at age 79 (The New York Times)
• The death certificate listed primary bacterial pneumonia (The New York Times; PEOPLE)
• Her two children, Dexter and Duke, were adopted (NPR)
• She never married (Vogue)

Still unclear

• Whether any unannounced final projects were in development at the time of her death.
• Whether the family will release a full list of funeral or memorial details.

At the time of the announcement, Vogue reported that no further details would be shared, and the family asked for privacy.

Key Lines From the Reporting

Keaton’s death certificate listed primary bacterial pneumonia as the immediate cause.

— The New York Times

Keaton never married, despite long relationships with Warren Beatty, Al Pacino, and Woody Allen.

— Vogue

Keaton adopted her son Dexter, and Duke joined the family five years later.

— NPR

Primary bacterial pneumonia was confirmed as the cause of death.

— PEOPLE

Why Keaton’s Legacy Outlasts the Headlines

Diane Keaton never tried to smooth away her edges, and that is exactly why so many people felt they knew her. The official cause of death and the shape of her family are now part of the public record. What remains is the record of a performer who proved that being difficult to categorize is not a flaw; it can be a career.

For similar coverage, see our articles on Ray Liotta: Cause of Death, Last Film, and De Niro’s Tribute and Cybill Shepherd: Health, Moonlighting Feud, and Life Now.

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