Emily Ratajkowsi has alleged pop star Robin Thicke groped her bare breasts during filming of the infamous 'Blurred Lines' music video.
The model recounts the incident in her forthcoming book My Body, according to The Sunday Times.
Ratajkowski, now 30, was one of three models that appeared in the 2013 video which also featured Pharrell Williams and Rapper TI, and was shot with an all-female crew.
She said she was initially enjoying the filming process, but that stopped abruptly when Thicke, who had apparently been drinking, made an inappropriate move.
"Suddenly, out of nowhere, I felt the coolness and foreignness of a stranger's hands cupping my bare breasts from behind. I instinctively moved away, looking back at Robin Thicke," she wrote, per The Times.
"He smiled a goofy grin and stumbled backward, his eyes concealed behind his sunglasses. My head turned to the darkness beyond the set. [The director, Diane Martel's] voice cracked as she yelled out to me, 'Are you okay?'."
Ratajkowski said she didn't react to the incident the "way she should have".
"I pushed my chin forward and shrugged, avoiding eye contact, feeling the heat of humiliation pump through my body," she said. "I didn't react - not really, not like I should have."
Martel confirmed the episode to The Times, saying she immediately brought filming to a halt as a result.
"I remember the moment that he grabbed her breasts," she said.
"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 f**k are you doing? That's it! The shoot is over!'"
Thicke was reportedly "sheepish and contrite" afterwards, and did apologise.
"I don't think he would have done this had he been sober," Martel said.
Ratajowski appeared in various states of undress in the controversial video but said that moment made her feel "naked for the first time that day".
"With that one gesture, Robin Thicke had reminded everyone on set that we women weren't actually in charge," she said.
The song's lyrics, which include the repetitive line "I know you want it", prompted outrage at the time amid accusations it was glorifying rape culture. It was banned in some nightclubs and university campuses as a result.
'Blurred Lines' made headlines again in 2015 when a judge awarded the children of Marvin Gaye nearly US$7.4 million after ruling Thicke and Williams copied the music legend's 1977 hit 'Got To Give It Up'.