A wolf of Wall Street will have to pay $1​8​ million for sexually harassing and then trashing online his pretty Swedish underling, a Manhattan jury found Monday.

The federal jury awarded Hanna Bouveng, 25, the payday in her case against her married ex-boss Benjamin Wey, the 43-year-old CEO of the billion-dollar New York Global Group.

Bouveng should get $2 million in compensatory damages over the harassment and defamation, the four-man, four-woman jury decided, and then heaped on another $16 million for punitive damages.

She testified that Wey pressured her into having sex with him at the luxury Financial District apartment he had rented for her.

Wey lasted just two minutes during the pair’s first tryst, her lawyer had said in opening statements.

When he later found another man in Bouveng’s bed, he was so furious that Wey fired her that day, kicked her out of the apartment and e-mailed her dad in what would be the beginning of a grimy online campaign against her.

“I saw a 6-foot-tall homeless black man named James lying on her bed. The man was totally naked, dirty, totally drunk and perhaps on illegal drugs,” Wey wrote to Bouveng’s father, Nils Sundqvist, in one e-mail entered into evidence.

Wey also e-mailed her family and friends and called her a “Swedish party girl” and prostitute on his bizarre site, TheBlot.

Bouveng had also testified that Wey pressured her into sharing a hotel room him on business trips

A female juror, asked after the decision if she’d be comfortable spending a night in a hotel room with Wey, smirked and said, “No comment!”

“We felt she was hurt in everything that came out on social media and in the media,” the juror added.

“We hope it will make companies and individuals think twice before personally defaming someone else.”

Bouveng gave a small smile to her lawyers as the jury foreman read aloud the first verdict of $2 million.

Even though Wey showed up grinning every day of the trial, he skipped court for Monday’s expected verdict.

After the jury awarded her $16 million more for punitive damages, Bouveng hugged her ex-boyfriend, nightclub promoter James Chauvet — the man whom Wey found in her bed.

Jurors were bothered by the trial’s often graphic testimony, the foreman said.

“It was a pretty disturbing trial. I think everybody was troubled by the nature of the case,” he said.

The jury did not find that Wey assaulted or battered Bouveng.

The trial included testimony from Wey, his wife, Michaela, Bouveng and Chauvet, whose turn on the stand presented a rare light moment as he told of the Wall Street exec barging in on him and demanding, “Did you f- -k her?” as the naked boyfriend pulled a bedsheet up to his chin.

The sophisticated Bouveng — whose grandfather founded an aluminum company and whose aunt is a member of Swedish parliament — broke down in tears on the stand as she described Wey’s relentless come-ons.

“We went back to the outside of my apartment, and he wanted to come up for tea,” she said, crying as she recounted how the father-of-three put his arm around her and kissed her neck.

“Then he stood up and grabbed my hand, and we walked into the bedroom,” she continued.

“And then he started to undress me. And he said he brought a box of condoms. And then we laid down to bed and we had sex.”

Bouveng’s lawyer, David Ratner, lambasted Wey for not showing for the verdict.

“He’s got balls when he’s hiding behind his stupid [blog], but when it comes to facing the jurors, he doesn’t show up,” he said.

“The jury said, yes, she was sexually harassed, yes, she suffered retaliation, yes, she suffered defamation, and they rejected everything Wey had to say,’’ he said. “She’s ecstatic, and we are very, very pleased.”

Ratner’s firm, Morelli Alters Ratner,, which successfully represented comedian Tracy Morgan against Walmart, will collect one-third of the payout.

Bouveng had sued for $850 million.

Wey’s lawyer vowed to keep on fighting.

“Lost in the headlines is the fact that the jury rejected completely Ms. Bouveng’s claims of forced sexual relations,” said the attorney, Glenn Colton.

The jury has spoken — the alleged forced events never happened,” Wey attorney Glenn Colton said in a statement.

“Of course, we are disappointed in other aspects of the verdict and plan to pursue post-trial remedies vigorously.”

Additional reporting by Ross Toback