Bill Cosby is one of the most popular guests in Tonight Show history.
He has made 66 appearances spanning a staggering 50 years, right up to his latest appearance in August with Jimmy Fallon.
So, it comes as a shock to hear the most jaw-dropping allegation yet in the Bill Cosby sex scandal.
He's accused of forcing himself on an actress backstage at The Tonight Show in 1971, even as Johnny Carson was still delivering his opening monologue.
The actress making the allegation is Louisa Moritz, a frequent guest on the 1970's TV game show Match Game.
Moritz also played sexy roles on the TV series Love American Style, and she is in the 1975 Oscar-winning Best Picture One Flew Over the Cuckoo's Nest, dancing with Danny DeVito.
Today, the 68-year-old actress is coming forward to recount a story from 43 years ago when she was a guest on The Tonight Show and Bill Cosby knocked on her dressing room door.
Moritz told INSIDE EDITION, "I open the door and I'm shocked because I see Bill Cosby there."
In a just-released statement she writes: "He began to discuss my future and how impressed he was with me and my work. The show had already started and Johnny's monologue was over. I expected to be called up in the first part of the show."
She said that Cosby forced her to perform a lewd act on him and then walked out, telling her, "Now you don't want to upset me and the plans for your future, do you?"
She said, "I should have slapped him, really hard."
Cosby's attorney, Marty Singer, is vehemently denying Moritz's story.
Singer said, "We've reached the point of absurdity. The stories are getting more ridiculous. I think people are trying to come up with these wild stories in order to justify why they have waited 40 to 50 years to disclose these ridiculous accusations."
He said that Moritz, who became a lawyer after her acting career ended, is no longer permitted to practice in California for "violating the Rules of Professional Conduct in her legal practice."
In addition to this statement, Cosby's attorney is also hitting back at all the accusers, saying they are "coming out of the woodwork with fabricated or unsubstantiated stories. People coming out of nowhere with this sort of inane yarn is what happens in a media-driven feeding frenzy."
However, she joins the growing list of women who are speaking out about Bill Cosby.