The French actress, who won the Palme d'Or at Cannes for Blue Is The Warmest Colour, said the film mogul stared at her "as if I was a piece of meat".
The allegations against one of cinema's titans, a man whose studio has garnered more than 300 Oscar nominations, have shaken Hollywood, which has long battled against a reputation for exploiting female actors, bypassing female directors and overlooking female-centered scripts.
Cohen's letter to the board did not describe the contents of Harvey Weinstein's file, nor did it address whether Weinstein had entered into private settlements with women who complained of misconduct.
He also appealed to the group's sense of fair play, saying: "You know what, I've always been loyal to you guys" before noting, with a great deal of profanity, that he was unlike other people - presumably celebrities - who treated them, shall we say, poorly.
At one point, Masse said, two of the children wandered into the room and "he screamed at them to leave".
"Next time you get the urge to masturbate, just ask yourself, am I in front of an employee or a colleague?" she continued. "After declining alcohol and announcing that I had school in the morning I left, uneasy but unscathed", Beckinsale said in her post.
TMZ reported that Weinstein has since made his way to a facility in Arizona for treatment, including for sex addiction, after initial reports that he was headed to Europe. At least three women who spoke to the New Yorker said they had been raped by Weinstein, who has maintained that he believed all the encounters were consensual.
"That's the most disgusting thing. He was using his power to get sex", she wrote.
She said the reports were "deeply concerning" as senior politicians called for Weinstein to be stripped of his honorary CBE.
"He's big and fat, so I had to be forceful to resist him".
NY police investigated him in 2015 when a 22-year-old Italian actress and model reported he had groped her, and she was sent into a meeting with him wearing a wire that picked up the now-infamous snippet of conversation from a hotel hallway.
She told the publication she had maintained her silence until now for fear that Weinstein would "crush" her.
According to the New Yorker, Gutierrez says Weinstein "lunged at her, groping her breasts and attempting to put a hand up her skirt" at a meeting in his offices in Tribeca.
The New York Daily News reported that the case involved aspiring actress Lucia Evans.
Seth MacFarlane has also come out to explain the story behind a joke he made at Weinstein's expense during the announcement of Academy Award nominations.
The district attorney's office declined to press charges, and Harvey Weinstein insisted that it was a setup, but some board members and top executives anxious that Harvey Weinstein had engaged in a pattern of behavior that could jeopardize the company.
Weinstein attended the world-famous festival many times and several movies he produced have been selected in the competition.