Diane Keaton’s Friend Gives Telling Clue to Her Cause of Death With Tragic Details From Her ‘Final Moments’—’She Lost So Much Weight’

Since the loss of one of Hollywood’s greats, fans have had questions about how Diane Keaton died and the mysterious cause of her death.

Keaton, an Oscar-winning actress best known for movies like Annie Hall, The First Wives Club, and The Godfather, was born on January 5, 1946, in Los Angeles, California. After multiple decades in Hollywood, including an Academy Award, a BAFTA Award, and two Golden Globe Awards, two Emmy Awards nominations, and a Tony Award nomination, Keaton died in her hometown on October 11, 2025, at 79 years old. Not many details have been given about the cause of Keaton’s death, however, her close friends have given clues about her health leading up to her passing. So how did Diane Keaton die and what was her cause of death? Read on for what we know so far about the state of her health.

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How did Diane Keaton die?

Keaton died on Saturday, October, 11, 2025, in Los Angeles, California. She was 79 years old. “There are no further details available at this time, and her family has asked for privacy in this moment of great sadness,” a spokesperson said in a statement at the time.

The Los Angeles Fire Department confirmed to People that they responded to a call at Keaton’s home at 8:08 a.m. PT and transported a 79-year-old woman to a local hospital.

According to 911 audio obtained by TMZ, Keaton was taken away from her home in an ambulance and later died. “Rescue 19, person down,” someone could be heard saying before the dispatcher gives Keaton’s address.

What’s Diane Keaton’s cause of death?

While Keaton’s cause of death hasn’t been confirmed, her longtime friend, Grammy and Oscar-winning songwriter Carole Bayer Sager, recalled seeing Keaton looking noticeably thin less than a month before her death. “I saw her two or three weeks ago, and she was very thin,” Sager said in an interview with People. “She had lost so much weight.”

She continued, “She had to go to Palm Springs because her house had been damaged inside, and they had to clean everything. She was down there for a while, and when she came back, I was kind of stunned by how much weight she’d lost.”

Sager went on to add that the late actress was a “magic light for everyone.” “I just loved her. She was so special, she just lit up a room with her energy. She was happy and upbeat and taking photographs of everything she saw. She was completely creative; she never stopped creating,” she said.

Another source also told People that Keaton’s health had “declined very suddenly” in the months before her death. “She declined very suddenly, which was heartbreaking for everyone who loved her,” the insider said. “It was so unexpected, especially for someone with such strength and spirit.”

The source continued, “In her final months, she was surrounded only by her closest family, who chose to keep things very private. Even longtime friends weren’t fully aware of what was happening.”

The insider also revealed that Keaton put her “dream home” on the market right before she passed, which surprised those around her, given that she planned to live there permanently. She listed the home for $29 million in March 2025.

What was Diane Keaton’s health like?

Before her death, Keaton had been outspoken about her battle with bulimia and skin cancer. “All I did was feed my hunger, so I am an addict,” she told Dr. Oz in 2014 about her eating disorder. “It’s true. I’m an addict in recovery, I’ll always be an addict. I have an addictive nature to me.” During her struggle with bulimia, Keaton recalled eating 20,000 calories before forcing herself to vomit.

She was also diagnosed with basal cell carcinoma in her 20s before getting diagnosed again decades later with squamous cell cancer—a form of skin cancer—that took two surgeries to remove. “It’s a family history,” she told the Los Angeles Times in 2015. “I remember my Auntie Martha had skin cancer so bad they removed her nose. My father had basal skin cancer and my brother had it. It’s tricky with this skin cancer. That’s why you’ve got to put the sunblock on.”

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