Alec Baldwin announces on Instagram that mother Carol Baldwin has passed away at the age of 92

Alec Baldwin announced his 92-year-old mother died Thursday in a heartfelt obituary he posted to Instagram.

Carol Baldwin, mother of the 64-year-old actor and his five siblings, died in Syracuse, New York — the same city where she was born and raised, went to college, and met her husband.

Alec Baldwin has posted side-by-side photos of his mother as a teenager and later in life. He noted his mother’s commitment to breast cancer support and research funding after surviving the disease herself.

“My mother taught me about second acts. And third parties too,” he said, referring to her personal battle with breast cancer. “She has spent the last 25 years of her life fighting and championing the cause to which she has devoted so much energy.”

The Baldwin matriarch – who also has 25 grandchildren and 14 great-grandchildren – was born Carol Newcomb Martineau on December 15, 1929.

She met her Brooklyn husband Alexander Baldwin Jr. when they were both students at Syracuse University. They married and had six children, raising them on Long Island until Alexander Baldwin’s death at age 55 in 1983.

Carol Baldwin then raised the children as a single mother and took a job in market research at a local mall when the youngest was a teenager.

In 1991, the mother of six children was diagnosed with breast cancer. She beat cancer and later, with support from the university’s then president, helped establish the Carol M Baldwin Breast Cancer Research Fund at Stony Brook University. A few years later, a second chapter was started at SUNY Upstate University.

The joint effort has raised millions of dollars for the cause, according to the obituary.

“We are all extremely proud of their achievements,” said Alec Baldwin.

Alec Baldwin’s niece Hailey Bieber shared his post on her Instagram Stories with the caption, “We love you Grandma.”