Diane Keaton’s cause of death has been revealed.

The actress died of pneumonia on Saturday, her family shared in a statement given to People Wednesday.

“The Keaton family are very grateful for the extraordinary messages of love and support they have received these past few days on behalf of their beloved Diane, who passed away from pneumonia on October 11,” the family said.

They continued, “She loved her animals and she was steadfast in her support of the unhoused community, so any donations in her memory to a local food bank or an animal shelter would be a wonderful and much appreciated tribute to her.”

A family spokesperson previously confirmed Keaton died in California on Saturday. She was 79.

A friend told People that Keaton’s health rapidly declined “very suddenly” and unexpectedly in the months leading up to her death, calling it “heartbreaking for everyone who loved her.”

Although Keaton chose to keep her health battle private, there were big changes in her life.

Keaton surprisingly listed her “dream home” in Los Angeles for $29 million in March, despite having said she planned to remain there permanently.

Keaton was known for walking her dog daily in her Brentwood neighborhood, another source told the outlet, but she wasn’t seen in the past couple of months.

The Oscar-winning actress’ last Instagram post was in April, and she appeared healthy and happy while snuggling up to her dog, Reggie.

Keaton was never married, but she had an on-again, off-again relationship with her “The Godfather” co-star Al Pacino for nearly two decades before calling it quits in 1990. She also famously dated her “Annie Hall” director Woody Allen and actor Warren Beatty.

She adopted two children in her 50s, daughter Dexter and son Duke.

In a 2012 interview with AARP, Keaton candidly talked about her fear of not being there for her kids as she aged.

“I’m very aware that my dad died when he was 68, and my mother was in her early 70s when her brain really started to go,” she told the outlet, per Parade. “When I think about my kids in their 20s and 30s, and me in my 70s and 80s, I worry about that, definitely.”

“‘I want to be there for them,” she added. “I want my body and mind to stay strong, and to share all these life lessons. But I also know they need to have the freedom and independence to learn on their own.”