Diane Keaton’s Cause of Death Revealed by Family: Oscar Winner Died from Pneumonia at 79

Legendary actress Diane Keaton’s cause of death has been revealed nearly a week after her passing. The Oscar-winning star died from pneumonia on Saturday, October 11, 2025, her family confirmed to PEOPLE on Wednesday.

Keaton, 79, had been battling declining health in the months leading up to her death, according to friends close to the actor. The “Annie Hall” star, known for her iconic film roles and distinctive style, leaves behind a legacy that spans over five decades in Hollywood.

Keaton’s Final Days and Health Struggles Before Death

Diane Keaton’s health had been deteriorating since earlier this year, friends say, following personal challenges that included damage to her Los Angeles home during wildfires. Her longtime friend, songwriter Carole Bayer Sager, told PEOPLE that Keaton appeared “very thin” and had lost significant weight after temporarily relocating to Palm Springs while repairs were made.

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

Keaton’s family expressed gratitude for the love and support they have received since her passing. They encouraged fans to honor her memory by donating to local food banks and animal shelters — causes that were close to her heart.

“It would be a wonderful and much appreciated tribute to her,” the family said in a statement.

A Storied Career and Lasting Legacy

Born in Los Angeles in 1946, Diane Keaton became one of Hollywood’s most beloved and versatile performers. Over her five-decade career, she played a wide range of characters — from mob wives to free-spirited mothers — and consistently pushed creative boundaries on screen.

Keaton won the Academy Award for Best Actress for her portrayal of nightclub singer Annie Hall in Woody Allen’s 1977 classic of the same name. The film won four Oscars and cemented her place in cinematic history. She was nominated for three more Oscars for her roles in “Reds” (1981), “Marvin’s Room” (1996), and “Something’s Gotta Give” (2003).

In total, Keaton earned 37 award wins and 63 nominations across major ceremonies including the BAFTAs, Golden Globes, Critics Choice Awards, and Emmy Awards. She amassed 74 film credits and was attached to three projects still in pre-production at the time of her death, underscoring her enduring passion for storytelling.

Beyond her on-screen work, Keaton was celebrated for her influence on fashion and culture. Her distinctive style — oversized suits, bowler hats, and bold individuality — inspired generations of actors, designers, and fans. She was also a passionate advocate for animal welfare and community causes throughout her life.

Tributes and Impact on Hollywood

News of Diane Keaton’s death has prompted tributes from across the entertainment world. Fellow actors, filmmakers, and fans have shared memories of her humor, kindness, and trailblazing spirit. Many credited her with breaking barriers for women in Hollywood, both in front of and behind the camera.

Keaton’s influence extended far beyond acting. She was also a photographer, producer, director, and author, with several books exploring art, architecture, and personal reflection. Her fearless approach to aging, creativity, and reinvention made her a role model for generations of artists and audiences alike.

Diane Keaton is survived by her two children, Dexter and Duke Keaton, as well as extended family. Her legacy — defined by courage, talent, and authenticity — will continue to shape Hollywood for decades to come.

FYI (keeping you in the loop)-

Q1: What was Diane Keaton’s cause of death?

Diane Keaton died from pneumonia on October 11, 2025, according to a statement from her family.

Q2: How old was Diane Keaton when she died?

She was 79 years old at the time of her death.

Q3: What were Diane Keaton’s most famous movies?

Some of her most acclaimed films include “Annie Hall,” “The Godfather,” “Reds,” “Marvin’s Room,” and “Something’s Gotta Give.”

Q4: Did Diane Keaton have any upcoming projects?

Yes, she was involved in three projects that were still in pre-production before her passing.

Q5: How is Diane Keaton being remembered?

Her family has asked that donations in her memory be made to local food banks or animal shelters, causes she deeply supported.

References

Associated Press. (2025). “Diane Keaton’s family confirms pneumonia as cause of death.” October 15, 2025.

PEOPLE. (2025). “Diane Keaton’s cause of death revealed as pneumonia.” October 15, 2025.

BBC News. (2025). “Oscar-winning actress Diane Keaton dies aged 79.” October 15, 2025.