Hasselhoff appeared upset when O'Brien brought up the allegations while he was on the show to promote the new movie, "Click," starring Adam Sandler.
"That's not what I'm here to talk about," Hasselhoff said. The two also had a contentious exchange when O'Brien brought up his kids:
O'BRIEN: And you've got little kids.
HASSELHOFF: Right. And you conned me into this, because you said you weren't going to talk about this.
O'BRIEN: No. Oh gosh, I never agree on conditions before I do any interview.
Earlier this year, Pamela Hasselhoff filed a declaration claiming that in December 2005, David "grabbed me and pushed me hard into a car," adding "in the past, he has also broken my nose and called me a 'whore,' 'c**t,' 'bitch,' 'slut' and 'drug addict' in front of our children."
In a heavily redacted declaration filed on June 20 in Los Angeles Superior Court, David Hasselhoff responded, "I categorically deny each and every ... allegation."