Bianca Gascoigne has claimed the Egyptian businessman groped her and forced her to kiss during their weekly meetings when she worked for him.
The 37-year-old has spoken out publicly about the allegations for the first time in a televised interview on The UK Tonight with Sarah-Jane Mee.
Bianca, who is the daughter of football legend Paul Gascoigne, had visited the luxury department store in Knightsbridge with her parents when she was growing up and said would be "charming" and bring them gifts.
The reality TV star and model had joined the luxury department store in a bid to further her career as a fashion buyer when she landed a job at at age 16.
She claimed that the grooming began as soon as she began reporting directly to Al Fayed.
Bianca branded the ordeal "horrific" and said she felt trapped and frightened one evening when he offered her Harrods Park Lane apartment to stay in before a flight
She said: "[Al Fayed] turned up at the apartment to my shock, I was just gobsmacked, I was kind of very shell-shocked."
Bianca said they sat on the sofa and attempted to "manoeuvre [my hands] on his private parts".
She added: "And I don't know how but I managed to wiggle away. And I think possibly you know, that him knowing my parents... I don't know, that might have saved me at that moment. But it was horrific."
Bianca, who recently had a daughter, decided she wanted to speak out after seeing other alleged victims of Al Fayed come forward.
The Metropolitan Police said it had recorded 60 allegations against Al Fayed since the BBC documentary, including claims of rape and sexual assault.
On Monday Harrods said more than 250 people are part of its process to settle compensation claims over Al Fayed's alleged sexual misconduct.
The department store has previously said it is "utterly appalled" by similar allegations and said it is a "very different organisation to the one owned and controlled by al Fayed between 1985 and 2010".
Express Online has contacted Harrods for comment.
Bianca Gascoigne's full interview on The UK Tonight With Sarah-Jane Mee from 8pm on Sky News
You may also like
Himachal Pradesh cabinet approves induction of 2061 Van Mantris, 150 nursing personnel
Harris and Trump push for every vote with just 14 days to go
Will win all seven seats in Rajasthan: BJP state chief on bypolls
Charlotte Tilbury fans use money saving hack to get 'bestselling' mascara for 86p
Before Diwali, you should also try this skin care routine, natural glow will come on the face