She’s the fairy godmother for Manhattan divorcées.

Nicole Noonan rescues Big Apple women who are headed for Splitsville with big-bucks hubbies from a dreaded fate: meager alimony and lousy custody arrangements.

The former matrimonial attorney is a divorce “fixer,’ hooking up soon-to-be-exes with a loan for protracted legal proceedings.

Noonan, 34, with model looks and bookish brains, is the secret weapon of lawsuit lender BBL Churchill, which focuses exclusively on divorce financing.

The business, launched by Australian barrister Brendan Lyle, is the first of its kind for the Big Apple.

Dubbed the “Robin Hood for divorcing women” by the Aussie press, Lyle boasts that Noonan, who works the court circuit by day and haunts Upper East Side social scenes by night, is a client magnet.

Recently, she was hobnobbing at millionaire Clive Palmer’s fete at the Intrepid Sea, Air & Space Museum alongside Brooke Astor’s son, Anthony Marshall, before he was hauled off to prison for swindling his mom.

Noonan co-chairs the New York Junior League, the elite charitable organization whose member ranks have included many first ladies plus Katharine Hepburn and Julia Child.

Her name also flies around Manhattan moms’ groups as the woman to know when a marriage sours.

“When people come to us, they’re afraid because their assets are frozen or their credit cards are cut off,” Noonan said.

“It’s definitely one of the hardest parts of their lives.”

She prefers her current gig to practicing law because she gets to use her compassionate side to help women “maintain a certain lifestyle” while headed toward a breakup.

“I do a little bit of hand-holding, telling them when there’s seemingly no end in sight that this divorce will not go on for 50 years,” she said.

The typical loan is about $250,000, which goes toward both attorney fees and living expenses for members of the ladies-who-lunch set who suddenly find themselves short on cash flow. Repayment comes after a resolution of the divorce or from the sale of a shared asset, such as a vacation home.

“The fact that they’ve got a war chest behind them and they’re not starved into an early settlement is very empowering,” Lyle said of his clients, noting that their boldface names frequently appear on Page Six.

“We’re very lucky to have her,” he said of Noonan, attributing the firm’s rapid growth entirely to her connections. “She’s very good at her job.”

Top Manhattan divorce attorney Allan Mayefsky, who has repped Katie Holmes, Christie Brinkley ex Peter Cook and diet guru Bethenny Frankel, is on BBL Churchill’s board. His support gives potential clients a peek into the firm’s prowess.

“If the husband turns around and says, ‘Listen. I’ll offer you $100,000,’ when they know if they can afford to fight on, they’ll get $1 million, we help them get a much better result,” Lyle said.