The 'Iron Man' actress has slammed the disgraced producer - who has been accused of sexual misconduct by dozens of women - for using false claims as an ''assault weapon'' after hearing he tried to coerce aspiring starlets into sleeping with him by repeatedly boasting they had been intimate.
Gwyneth told the New York Times newspaper: ''He's not the first person to lie about sleeping with someone, but he used the lie as an assault weapon.''
The 45-year-old actress has been connecting with some of the women who claimed Weinstein had used her name in their encounters in a number of ''devastating'' phone calls.
The movie mogul allegedly told one young actress in 2000 that complying with him was the ''best thing you can do for your career now'', mentioning Gwyneth and others as examples of his influence, while another woman told the publication she remembered a photo of the Oscar-winning star being displayed prominently in the room where Weinstein allegedly assaulted her in 2004.
The 'Seven' star - who is believed to be engaged to partner Brad Falchuk and has two children, Apple, 13, and Moses, 11, with ex-husband Chris Martin - was the subject of unwanted attention from Weinstein over 20 years ago, an incident she reported to her agent, C.A.A.'s Rick Kurtzman.
According to Gwyneth, Rick ''looked incredulous'' and expressed revulsion but didn't suggest bringing it to the attention of senior staff at the agency.
C.A.A. have now apologised to any clients the agency have ''let down''.
In response to the article, they told The Wrap in a statement: ''We apologise to any person the agency let down for not meeting the high expectations we place on ourselves, as individuals and as a company. We unequivocally support those who have spoken out publicly.
''Out of respect for our clients, we will maintain the confidence of anything said in private conversations.
''We continue to take additional action. We established an initiative called Evolve, led by a group of 17 women, to evaluate and improve our existing policies and practices to ensure even greater vigilance, awareness, and information-sharing in preventing harassment.''
Gwyneth previously claimed she was harassed by Weinstein when she was working on 'Emma' at the age of 22.
The producer was said to have placed his hands on the actress' shoulders and suggested they head to the bedroom for massages.
She said: ''I was a kid, I was signed up, I was petrified.''
The 'Shakespeare in Love' star refused the alleged advances and told her then-boyfriend Brad Pitt, who confronted the producer, and Weinstein later asked Gwyneth not to tell anyone what had allegedly happened.
She added: ''I thought he was going to fire me.''
Weinstein has been accused of sexual misconduct by over 50 women, but has denied any allegations of non-consensual sex.
And his lawyers, Berk and Brafman, said in a statement: ''Mr. Weinstein has never at any time committed an act of sexual assault, and it is wrong and irresponsible to conflate claims of impolitic behaviour or consensual sexual contact later regretted, with an untrue claim of criminal conduct.
''There is a wide canyon between mere allegation and truth, and we are confident that any sober calculation of the facts will prove no legal wrongdoing occurred.
''Nonetheless, to those offended by Mr. Weinstein's behaviour, he remains deeply apologetic.''
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