The actress Ellen Page has claimed director Brett Ratner publicly "outed" her without her consent and before she was ready to make her sexuality public.
The Inception star, 30, accused the Hollywood producer of making a "homophobic" comment about her while filming his 2006 movie X Men: The Last Stand when she was 18 years old.
She made the allegations in a long Facebook post condemning high-powered "abusers" who "make us feel powerless and overwhelmed by their empire".
Page said Ratner had told a female colleague standing next to her that "You should f*** her to make her realize she's gay" during a cast and crew 'meet and greet' before filming for X Men: The Last Stand.
"I was eighteen years old," Page wrote in the post.
"I was a young adult who had not yet come out to myself. I knew I was gay, but did not know, so to speak. I felt violated when this happened.
"He 'outed' me with no regard for my well-being, an act we all recognize as homophobic."
She continued: "We are all entitled to come into an awareness of our sexual orientation privately and on our own terms.
"This public, aggressive outing left me with long standing feelings of shame, one of the most destructive results of homophobia. Making someone feel ashamed of who they are is a cruel manipulation, designed to oppress and repress."
Actress Anna Paquin, who also starred in X Men: The Last Stand, backed Page's claim in a Twitter post, where she wrote: "I was there when that comment was made. I stand with you."
Shortly afterwards, she posted: "If you can't think of the glaringly obvious reason I remained silent then perhaps you've forgotten that I've been in this victim grooming industry since before I hit puberty."
Page's statement comes days after Ratner faced a string of sexual allegations made against him by seven women.
The Rush Hour director denied claims of sexual misconduct by six women, including actress Olivia Munn, who spoke to the Los Angeles Times.
He has also sued a different woman who alleged on Facebook that he raped her, according to a lawsuit filed in Hawaii.
Munn showed her support for Page sharing her story in a tweet reading: "Proud of you @EllenPage...Every story that comes out helps people to understand that the gauntlets we have to run through just to work are very real."
Ratner's agent has been contacted for comment.