Rose McGowan has accused Ben Affleck of being a liar for allegedly concealing information about disgraced movie mogul Harvey Weinstein two decades ago.

The actress reacted Tuesday to Affleck’s declaration that “additional allegations of assault that I read this morning made me sick” after The New Yorker published an expose detailing instances where Weinstein allegedly raped women by forcibly performing or receiving oral sex, and forcing vaginal sex.

Several hours later, McGowan said in a tweet that the actor has been well aware of Weinstein’s behavior for many years: “Goddamnit! I told him to stop doing that,” she claims he said to her at a “press [conference] I was made to go to after [the] assault.” She added, “You lie.”

In another tweet, she told Affleck to “f— off.”

The New York Times reported that McGowan reached a $100,000 settlement with Weinstein after an encounter in a hotel room with the executive producer in 1997 during the Sundance Film Festival. The payout was “not to be construed as an admission” by Weinstein, but intended to “avoid litigation and buy peace,” according to the newspaper.

McGowan starred in 1996’s “Scream,” which was released by Mirmax’s Dimension label, and then starred with Affleck in the comedy “Going All the Way,” which was shown at the 1997 Sundance festival and released by Gramercy. McGowan and Affleck also starred in the 1998 Dimension movie “Phanthoms.” She did not mention “Going All the Way” or “Phantoms” in her tweet.

McGowan said in an Oct. 5 tweet in reaction to the New York Times story, “Women fight on. And to the men out there, stand up. We need you as allies.”

Affleck starred in two movies in 1997 that were released by Miramax — “Chasing Amy,” with Joey Lauren Adams; and “Good Will Hunting” with Matt Damon, for which Affleck and Damon received a screenwriting Oscar. He also starred in 1998’s “Shakespeare in Love,” which won the best picture Academy Award and was released by Miramax.

Reps for Affleck were not immediately available for comment Tuesday.

McGowan also launched a petition drive on Tuesday to dissolve the board of the Weinstein Company. “If you believe the Weinstein Company should completely dissolve after 30 years of sexual abuse against innocent women please join me in signing this petition to honor the victims and their bravery,” the actress wrote.

McGowan launched the drive in the wake of reports that TWC plans to change the name of the company in the wake of the scandal.

“TWC You don’t get to change your company name & be done with it,” she said on Twitter. “Every man there has the blood of sorrow on their hands. You are dirty.”