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Diane KeatonSwan Gallet for WWD

Diane Keaton‘s friends are sharing details that may allude to the actress’ cause of death.

On October 11, news broke that the Oscar winner had died at age 79 but offered limited details about how she died. Now, details are emerging about Keaton’s final days.

Longtime friend Carole Bayer Sager told People that when she saw Keaton recently, she was shocked by her appearance. “I saw her two or three weeks ago, and she was very thin,” the award-winning singer-songwriter said. “She had lost so much weight.”

Sager added that she hadn’t seen Keaton often over the past year after the actress left Los Angeles following the wildfires earlier this year.

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

Another pal told People that the Annie Hall star’s health took a turn quickly in recent months, leaving some of her closest friends in the dark about what was happening. “She declined very suddenly, which was heartbreaking for everyone who loved her,” the friend said. “It was so unexpected, especially for someone with such strength and spirit.”

The source added, “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.”

What Was Diane Keaton’s Cause of Death?

No official cause of death has been revealed after Keaton’s passing. A recording of a 911 call obtained by TMZ reveals that the Los Angles Fire Department was called to Keaton’s LA home at around 8am on Saturday, October 11, responding to reports of a “person down.”

Prior to her death, Keaton battled with bulimia and skin cancer.

Keaton spoke about her eating disorder to Dr. Oz in 2014. “All I did was feed my hunger, so I am an addict,” she said. “It’s true. I’m an addict in recovery, I’ll always be an addict. I have an addictive nature to me.” She revealed that, during her battle with bulimia, she would eat up to 20,000 calories and then force herself to throw it up.

In her 20s, Keaton overcame basal cell carcinoma. Then, decades later, she was diagnosed with squamous cell cancer which 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.”

Keaton is survived by her two children, daughter Dexter, 29, and son Duke, 25, who she welcomed through adoption when she was in her 50s.