O'Donnell, 57, slammed Goldberg, 63, in "Ladies Who Punch: The Explosive Inside Story of 'The View.'"
“Whoopi Goldberg was as mean as anyone has ever been on television to me, personally — while I was sitting there,” O’Donnell said in the book (via People). “Worse than Fox News. The worst experience I’ve ever had on live television was interacting with her.”
O'Donnell admitted that she initially admired Goldberg and was thrilled at the opportunity to work with her.
“She’s a minority, feminist, smart, funny, groundbreaking legend who is black in America,” O’Donnell said. “I’m never going to not have respect for Whoopi Goldberg. But that was a painful experience, personally and professionally.”
The beef began, according to O'Donnell, in 2009, when O'Donnell vocally disagreed with Goldberg about whether director Roman Polanski was guilty of raping 13-year-old Samantha Geimer. Goldberg famously said what Polanski did "wasn't rape-rape."
In 1977, Polanski was arrested in Los Angeles and charged with rape by use of drugs, perversion, sodomy, furnishing a controlled substance to a minor and lewd and lascivious act upon a child under 14. He pleaded guilty to the lesser charge of committing statutory rape, but fled the country in 1978 before his sentencing.
O'Donnell left the show in 2007 and returned in 2014. She alleged in the book that Goldberg would frequently shut down her ideas and that the stress of filming "The View" daily with Goldberg took a toll on her health.
"I thought my head was going to explode. My doctor called me and said, 'Come in right now. Your heart rate during that is dangerous for you. I don't want you doing that show anymore,'" she claimed.
O'Donnell left "The View" for good after her six-month stint in 2015 and said that others noticed the tension between the two comedians on the set.
“Some people would say, ‘What’s going on with you and Whoopi?’" O’Donnell says in the book. “I was like, ‘Are you watching the show? It’s pretty much right there.’ I have no desire for a public feud.”
A rep for Goldberg did not immediately return Fox News' request for comment on her feud with O'Donnell.