Diane Keaton Battled Unnamed Illness Before Passing at 79, Friend Reveals

Oscar-winning actress Diane Keaton, known for her iconic roles in Annie Hall and The Godfather, passed away on October 11, 2025, at the age of 79.

While her family confirmed that pneumonia was the immediate cause of death, a close friend disclosed that Keaton had been suffering from an unnamed illness in the months leading up to her passing.

This revelation sheds light on the rapid decline in her health, which had been kept private even from her inner circle.

In the final months of her life, Keaton’s health reportedly declined rapidly, and she had become notably thin, according to songwriter Carole Bayer Sager.

Despite the severity of her condition, only her closest family members were aware of the details, choosing to keep her illness private—even from longtime friends.

Keaton had a history of health issues, including surviving skin cancer and struggling with an eating disorder.

She had spoken candidly in the past about her family’s history with skin cancer and her late adoption of sun care.

The news of her passing has left the entertainment world in mourning, with tributes pouring in from colleagues and fans alike.

Her family expressed gratitude for the outpouring of love and encouraged donations to food banks and animal shelters, causes close to Keaton’s heart.

In her last social media post, shared in April 2025, Keaton featured her beloved dog, Reggie, reflecting her enduring love for animals.

Keaton’s legacy as a trailblazing actress and her advocacy for causes she cherished will continue to inspire future generations.