He also said he was never alone with the model, which Upton agreed with. Upton used the hashtag that's come to represent the anti-harassment movement that's swept the business world. after her remarks on Twitter, where the model has almost 2.4 million followers.
"He shouldn't be allowed to use his power in the industry to sexually and emotionally harass women #metoo", she captioned the Instagram post.
"As a leader in the fashion industry, Guess?, Inc. takes seriously any allegation of sexual harassment", the company said in a statement.
Shannon says that the two then had sex and that their intimate relationship continued in hopes that she would get the Guess campaign that she claims he promised her.
Marciano has denied Upton's allegations, calling them "prepostorous".
Upton admitted she went "back and forth" about sharing her experience, reasoning "it's always easier to leave things in the past", but spending time with a crop of new models motivated her to come forward.
She told TMZ: "I think it's important that Guess changes the culture of their offices, and there would be a lot of changes that need to be made before I would ever consider working with them again".
'I fully support the #metoo movement.
All of this sounds reminiscent of the behavior of disgraced mogul Harvey Weinstein, i.e. the forceful invitations to spend time alone, the mention of other successful women he'd supposedly slept with.
Eventually, Tsai - Upton's friend, protector, and Guess photographer - was sacked (the photographer told Time that Upton's account is accurate). Upton also alleges he tried to walk her to her hotel room, but a photographer stepped in, in order to protect her from Marciano. "He said, 'I'm making sure they're real'".
Upton continued, "Despite doing everything I could physically do to avoid his touch throughout the meeting, he continued to touch me in a very dominating and aggressive way, grabbing my thighs, my arms to pull me closer, my shoulders to pull me closer, my neck, my breasts, and smelling me".
Apparently after rejecting his advances repeatedly, the Sports Illustrated model was sacked from a photo shoot.
In the Time interview, Upton described her first day of work in July 2010 for a Guess lingerie campaign.
Upton also alleged in a recent interview with Time magazine that after she rebuffed his advances several times in 2011, Marciano spread rumors about her, called her a "fat pig" and fired her.