Beverly Johnson, Bill Cosby Beverly Johnson, Bill Cosby

Bill Cosby is being sued for defamation, as another former supermodel has come forward saying he abused her.

In a column for Vanity Fair, former supermodel Beverly Johnson says Cosby attempted to assault her after she auditioned to be an extra on The Cosby Show in the 1980s. "I needed a big break badly and appearing on The Cosby Show seemed like an excellent way of getting Hollywood's attention," she writes. "[Cosby] asked what I wanted from my career going forward. He seemed genuinely interested in guiding me to the next level. I was on cloud nine."

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Johnson says Cosby invited her to his brownstone to rehearse lines and offered her an espresso that he had prepared in his personal machine. "I knew by the second sip of the drink Cosby had given me that I'd been drugged — and drugged good," she writes, adding that she immediately began yelling at the comedian. "I recall his seething anger at my tirade and then him grabbing me by my left arm hard and yanking all 110 pounds of me down a bunch of stairs as my high heels clicked and clacked on every step. I feared my neck was going to break with the force he was using to pull me down those stairs."

Johnson says she remembers Cosby shoving her into a taxi, and that she woke up in her own bed the next day with no memory of how she got home.

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According to Johnson, she decided to confront Cosby about the incident and called his house a few days later, but backed off after his wife answered and said it was too late for them to take calls (8 p.m. PT). She eventually decided to let the issue drop. "In the end, just like the other women, I had too much to lose to go after Bill Cosby," she writes. "I had a career that would no doubt take a huge hit if I went public with my story and I certainly couldn't afford that after my costly divorce and ongoing court fees."

At the same time, another of Cosby's alleged victims, Tamara Green, is suing the actor for defamation, USA Today reports. A lawyer for Tamara Green says Cosby's flat denials of her claims that he drugged and raped her in the 1970s in effect mean he has "publicly branded Plaintiff Green a liar."

This is the latest in a series of lawsuits that have been filed against Cosby by his alleged victims. The LAPD is investigating the multiple accusations against him.