Ex-powerhouse producer Harvey Weinstein tried to force a young actress into a torturous threesome with an Italian-born starlet before later raping her, she tearfully testified in Manhattan court Tuesday.

Jessica Mann, now 40, hysterically broke down on the witness stand when she recounted in court for the third time how the grotesque, then-300-pound Weinstein pinned her down on a bed before allegedly raping her inside the Doubletree Hotel in Midtown on March 18, 2013.

“I said, ‘No’ over and over, and I tried to leave,” Mann said through sobs, shortly before showing jurors how Weinstein allegedly pinned both of her wrists above her head during the sex attack.

“He just treated me like he owned me,” she said.

Mann said Weinstein also raped her later that year — and that she passed out during the asssault because he was “so heavy.”

The jailed mogul, who sat in a crinkled suit in a wheelchair, was originally convicted of raping Mann in 2020, but the state’s high court later over turned the verdict, paving the way for a second trial that then ended with a hung jury.

Mann — on the stand Tuesday for the second day in what is now the fallen Hollywood kingpin’s third Manhattan sex-crimes trial — testified about two alleged sex attacks she endured from Weinstein.

The former actress said that shortly after she met Weinstein in Los Angeles as a 27-year-old trying to launch her acting career, the horn dog quickly went from admiring her potential to trying to get in her pants.

Mann testified about having a “full-on breakdown” when Weinstein allegedly tried directing her to have a threesome with Italian-born actress Emanuela Postacchini at the Montage Beverly Hills hotel in February 2013 — causing Mann to run into a bathroom and break out in tears.

A disgruntled Weinstein went on to sleep with Postacchini — who Mann said consoled her in the moment — before the perv allegedly muttered to Mann, ” ‘Oh, I’ll never try to do that again with you,’ ” after the bathroom scene.

Mann testified she had a consensual relationship with Weinstein at one point because she felt that it could lead to a “loving relationship” — while also noting how Weinstein’s power in Tinseltown affected her decision to get involved with him.

She described how Weinstein could switch from Hollywood icon into an erratic brat who would make a whole lot out of nothing if he didn’t get his way.

“Harvey told me a lot of stories about just how powerful he was and the things he did,” the cosmetologist and hairstylist said.

“Essentially, his friends go very far and his enemies don’t step foot in this town,” she said of the persona he cultivated.

Mann said Weinstein told her that he was in an “open relationship” with then-wife Georgina Chapman when they decided to a consensual relationship — and even laughed in her face once when she asked if she was his girlfriend.

Mann said she was anxious about Weinstein’s relationship with powerful people such as former President Bill Clinton.

“He just always name-dropped everybody all the time,” she said of Weinstein. “It was just the part of the reality of who he is. He is not a normal person. I was not in a relationship with a normal person.”

Weinistein was originally convicted of raping Mann and forcing oral sex on former “Project Runaway” production Assistant Mimi Haley in 2020.

But after New York’s highest court overturned the guilty verdict, Mann testified again last summer — staring down Weinstein upon wrapping up and pointing a finger at her eye, demanding that the convicted sex pest look at her.

Jurors at the re-trial convicted him again of the Haley charge but could not decide on the Mann rap after a tumultuous week of deliberations.

Mann also testified Tuesday about the second assault later in 2013 where she claims Weinstein raped her after she told him that she had found true “love” with an actor. She recalled falling unconscious under his weight at the time.

Mann, who told the jury that Weinstein once told her that she was “prettier than Natalie Portman,” said she continues to believe that he is still a “genius” even after the alleged rape.

“There are things about Harvey that I really like,” Mann said, as Weinstein peered over to the jury with a slight smile.

Weinstein has pleaded not guilty and faces faces up to 25 years in prison when he’s sentenced on the charge of forcing Haley into oral sex.

He has already been convicted of a rape in California and sentenced to 16 years behind bars there.

Mann is expected to return to the Manhattan witness stand Wednesday.