The co-founder of the Communications Clinic joined a long line of high profile women who have shed light on abuses by powerful men in the wake of allegations against the disgraced producer.
In a strong statement on The Late Late Show on Friday, she claimed an Irish radio host would sit beside her naked from the waist down in studio when she was a teenager.
Speaking on a panel with former Senator Fidelma Healy Eames and journalist Kitty Holland, she said: “I can remember at 16 going and doing work in the entertainment business and I was immediately taken aside by older women who said: ‘Don’t get into the lift with ‘head the ball’…They said: ‘He will take you down to the basement, he will put one finger on the button so that the lift can’t move and his hand will go up your skirt.
“There was this guy, if you were doing an interview live on the air, or if you were more likely reading a short story or something, he would come in and sit down beside you and he would remove all of his clothing below the waist.
“He was a professional broadcaster. He’s dead, we don’t have to worry about it. The odd thing was that it became a kind of idiosyncrasy, it was kind of like local colour - that’s what he does - terrifying. And then what you have is the kind of PR around people like Weinstein.”
Ms Prone, who has worked in the business since she was 15, launched a scathing attack on Weinstein and the idea that he grew up in a different era.
She said: “This is not dinosaur, this is scumbag. No there wasn’t a lot of it about. I was there. It was never at that kind of violent, disgusting, persistent, power-grabby level."
The Room Director said: "Right now, here in Ireland, there will be powerful abusers relying on the silence of colleagues. Let’s hope their time is up.
“All of us have a duty to expose the harassers and resist the culture of accommodation that grows around powerful men.
She said: “I disliked him intensely” and added: “There really was something repulsive about him and he would have been very aware of my dislike for him.”