In a lengthy Facebook post Page accused Ratner of making the slur about her to another actors during the first day of filming the movie, in which she was starring as Kitty Pryde.
"I was eighteen years old. He looked at a woman standing next to me, ten years my senior, pointed to me and said: 'You should f*** her to make her realise she's gay.' He was the film's director, Brett Ratner. 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," Page wrote of Ratner's comment.
Anna Paquin, who also starred in the film, confirmed Page's story on Twitter. "I was there when that comment was made. I stand with you. @EllenPage" Paquin wrote on social media shortly after Page went public.
Page also said in the post that she was taken out to business dinner by a director when she was 16 years old and he fondled her leg under the table.
Page labelled appearing in Woody Allen's movie the "biggest regret" of her career. Allen has been accused of molesting his daughter, Dylan Farrow.
"I did a Woody Allen movie and it is the biggest regret of my career. I am ashamed I did this. I had yet to find my voice and was not who I am now and felt pressured, because 'of course you have to say yes to this Woody Allen film.' Ultimately, however, it is my choice what films I decide to do and I made the wrong choice. I made an awful mistake," she added.