Emily Ratajkowski has revealed her reason for not speaking out against Robin Thicke sooner.

The supermodel, 30, admitted she thought speaking out about the alleged assault allegations would impact her career in a negative way, thus remained tight-lipped for years since the 'Blurred Lines' music video came out.

In an excerpt from her upcoming book My Body, Ratajkowski accused the singer of sexually assaulting her during the filming of the music video.

"Suddenly, out of nowhere, I felt the coolness and foreignness of a stranger’s hands cupping my bare breasts from behind," she wrote in an excerpt shared by The Sunday Times.

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"I instinctively moved away, looking back at Robin Thicke. He smiled a goofy grin and stumbled backward, his eyes concealed behind his sunglasses. My head turned to the darkness beyond the set," she added.

In the excerpt, Ratajkowski also recalled how she was "desperate to minimize" the incident, which she said occurred while Thicke was drunk, and how she "didn’t react - not really, not like I should have".

As she spoke to People about the alleged incident, the model said that she didn’t come forward with the allegations sooner over concerns for her career.

"I was an unknown model and if I had spoken out or complained, I would not be where I am today, I would not be famous," she told the publication.

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And when asked why she decided to come forward with her story now, she credited her growth and the "evolution" of her personal politics.

"I wrote a book about the evolution of my politics and that includes a lot of different experiences from my career and my life and the way that I felt and thought about those experiences have evolved," she went on.

"I hope people are able to read the essay and understand the nuance behind these kinds of situations."

While speaking with the outlet, Ratajkowski also expressed her hope that sharing her story can help other women who have found themselves in similar situations, before acknowledging the existence of a "sort of a double-edged sword" when women want to "capitalize" off their image.

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Ratajkowski went on to admit she hopes that sharing her story will help other women who have found themselves in similar situations.

She added that there's "sort of a double-edged sword" that exists in the industry for women who want to "capitalize" off their image.

"I think all women, we all play the game, capitalizing off of your image, commodifying their body, that’s the world that we live in and I would never tell a woman that she shouldn't but I also would hope that they understand that that’s sort of a double-edged sword," she added.

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Speaking to The Times, director Martel appeared to confirm the incident took place, which she says would not have happened "had [Thicke] been sober".

"I remember the moment that he grabbed her breasts. One in each hand. He was standing behind her as they were both in profile. I screamed in my very aggressive Brooklyn voice, ‘What the fuck are you doing, that’s it!! The shoot is over,'" Martel told the newspaper. She also added that Thicke apologized after the incident.

The Sunday Times adds that "multiple attempts were made to contact Thicke's representatives" with regards to Ratajkowski's allegations, but the publication received no response.

Featured image credit: REUTERS / Alamy

Emily Ratajkowski reveals why she didn’t speak out sooner about Robin Thicke allegations