BELOVED NANCY REAGAN has just months to live, friends fear.

The 91-year-old widow of the late President Ronald Reagan is now wheelchair-bound after break­ing three ribs in a fall, and she rarely leaves her home, sources say.

“Nancy only goes out for medical appointments or an oc­casional lunch with an old friend,” said a friend and associate.

“Her skin is paper-thin and eas­ily bruised. Her face and hands are covered with purple welts. She’s close to the end.”

The former first lady was photographed being pushed in a wheelchair by two Secret Service agents outside the Beverly Hills Medical Plaza on Nov. 19.

“Mrs. Reagan appeared disorient­ed, pale, weak and very fragile,” an eyewitness told The ENQUIRER. “She was so bony her clothes ap­peared to be falling off her.”

When the agents got Nancy to her vehicle, they had to lift her out of the wheelchair.

“Mrs. Reagan was barely able to stand,” said the eyewitness. “If it weren’t for the Secret Service agents, she wouldn’t have been able to get into the car on her own.”

As The ENQUIRER reported in September 2011, Nancy’s weight had plummeted to just 84 pounds and she’s declining mentally, say sources. “Nancy can recognize peo­ple’s faces but often has a hard time remembering names,” revealed a longtime friend. “The fear is that she’s in the early stages of Alzheim­er’s or senile dementia.”

The longtime GOP matriarch still hasn’t recovered fully after breaking her ribs when she fell at her home in April, sources say, and she’s rarely been seen in public during the past year.

“We’re all praying for Nancy,” said another friend. “But it looks like she’s at the end and has only months, at most, to live.”

Still, she hopes to hang on through the holidays, added the friend.

Her kids, Ron and Patti, are both hoping to see her soon. But they probably won’t see her to­gether because they are estranged from each other and half brother Michael.

“It’s a dysfunctional family, and Nancy prays that they can all put their grudges aside once before she dies,” said the source. “She’d love to see them all over the holidays. Christmas has always been such a big thing for her.

“In any case, she’s led an amazing life and has no regrets that it’s near­ly over. She can’t wait to be reunited with her precious Ronnie.”