The 62-year-old businesswoman told Vanity Fair that the attack took place at the TV star's New York brownstone in the mid-80s, when she visited to read through lines for a small part on The Cosby Show.

The comedian had invited Ms Johnson to his home for brunch a few days earlier with her young daughter, a move that she said, in retrospect, 'seems like part of a perfectly laid out plan, a way to make me feel secure with him at all times'.

Instantly she knew the drink had been drugged, she said.

Ms Johnson wrote: 'My head became woozy, my speech became slurred, and the room began to spin nonstop. Cosby motioned for me to come over to him as though we were really about to act out the scene.

'As I felt my body go completely limp, my brain switched into automatic-survival mode. 

'That meant making sure Cosby understood that I knew exactly what was happening at that very moment.' 

She told him: 'You are a motherf***** aren’t you?', according to the detailed Vanity Fair account, published on Thursday.

The former model claimed that as the drug began to take hold of her, she repeatedly kept cursing at Cosby.

The TV star appeared angry, she claimed, then grabbed her by the arm and dragged her down stairs with force before pulling her out into the street and dumping her in a taxi.

MailOnline on Thursday reached out to Cosby's lawyer, Marty Singer, and was awaiting a response.  

Ms Johnson said that it took several days for the effects of the drug to wear off and that when they did, she called Cosby's number to confront him.

Instead of the comedian, his wife Camille answered the phone and told her that it was too late for her husband to take the call and she should call back.

'At a certain moment it became clear that I would be fighting a losing battle with a powerful man so callous he not only drugged me, but he also gave me the number to the bedroom he shared with his wife,' Ms Johnson wrote in the magazine.

'In the end, just like the other women, I had too much to lose to go after Bill Cosby.' 

The supermodel's allegations bring the total number of women who have come forward to accuse Cosby to 24.  

Ms Johnson wrote that part of her reason for staying silent on Cosby was that she didn't want to be an 'angry black woman' going after highly-regarded man in the African-American community.

(dailymail.co.uk)