Alec Baldwin.Photo: Dimitrios Kambouris/Getty

Alec Baldwin speaks during the 2021 RFK Ripple Of Hope Gala at New York Hilton Midtown on December 09, 2021 in New York City.

Carol M. Baldwin, the mother of actorAlec Baldwin, has died. She was 92.

Announcing her death on Instagram Thursday, Alec posted a vintage photo of his mother alongside a more recent image. In the caption, hewrote, “Carol M. Baldwin, mother of actors Alec, Daniel, William andStephen Baldwinand two daughters, Elizabeth and Jane, died today in Syracuse, New York.”

He went on to share details about her life, writing, “Born Carol Newcomb Martineau, in Syracuse on December 15, 1929, she was the child of Roy and Marion Martineau and had one brother, Daniel, and five sisters, Patricia, Joan, Diane, Louise and Rebecca.”

He said she met her husband Alexander R. Baldwin Jr., who was nicknamed Alec, when they were students at Syracuse University. The family moved to Long Island, and while there, he worked as a history teacher and football and riflery coach at Massapequa High School. He later died in 1983 at age 55, the actor said in his post.

Never miss a story — sign up forPEOPLE’s free daily newsletterto stay up-to-date on the best of what PEOPLE has to offer, from juicy celebrity news to compelling human interest stories.

“Carol Baldwin raised her children and, when her last was a teenager, went to work in marketing research for a firm called Quick Test, operating out of a local shopping mall,” Alec wrote. “In 1991, she was diagnosed with breast cancer. After she survived, she joined with a group of Long Island-wide breast cancer support groups to launch an effort with SUNY Stony Brook.”

hailey bieber/Instagram

https://www.instagram.com/stories/haileybieber/2847048708840719996/?hl=en

In a statement included in the touching Instagram post, Alec shared, “My mother taught me about second acts. And third ones, too. She spent the last 25 years of her life as a fighter and a champion for the cause to which she devoted her life. We are all enormously proud of her accomplishments.”

RELATED VIDEO: Hailey Baldwin Shuts Down Pregnancy Rumors Over Her 2022 Grammys Look: ‘Leave Me Alone’

Hailey Bieber, 25, the daughter of Stephen, shared Alec’s post on her Instagram Story and wrote, “We love you Grandma.” She added emojis of a white heart and a dove.

source: people.com