Rose McGowan labelled Alyssa Milano a "moron" as the pair clashed over Texas abortion laws.
New legislation came into effect on September 1 in Texas which prevents women from being able to get an abortion if they are over six weeks pregnant.
The law has come under fire from many celebrities including the likes of Rose's Charmed co-star Alyssa as well as Emmy Rossum, Kelly Rowland and Jameela Jamil.
But Rose has hit out at those celebrities for just posting about the law and not doing more to help.
"This is really going to help for sure absolutely moron achievement unlocked," she wrote alongside a screenshot of an article which listed a number of celebs helping to raise awareness.
In her original tweet, Alyssa slammed the law, which came into force earlier this week.
"The newest Texas abortion ban, #SB8, gives politicians, neighbors, and even strangers the right to sue those who provide - or just help patients get - abortion after 6 wks," she wrote.
"The time to fight for our reproductive health & rights is now! #BansOffOurBodies."
Jameela Jamil called for more support for women.
She wrote: "Why is the mainstream media not FRANTICALLY covering what is happening in Texas tonight regarding #RoeVWade?!"
Emmy Rossum penned a similar message to Alyssa, writing: "The newest Texas abortion ban, #SB8, gives politicians, neighbors, and even strangers the right to sue those who provide — or just help patients get — abortion after 6 wks.
"The time to fight for our reproductive health & rights is now! #BansOffOurBodies."
Planned Parenthood also criticised the new law.
"Texas’s S.B. 8 violates Texan’s rights but the Supreme Court has let it go into effect. We aren’t backing down and are still fighting. Everyone deserves access to abortion. #BansOffOurBodies," they wrote.
"This ban is ridiculous and it’s part of a RECORD number of abortion restrictions passed this year. We’ve declared today a Day of Action — because it’s on all of us to step up and fight for reproductive freedom. #BansOffOurBodies."
It is not the first time Rose has criticised Alyssa as she previously slammed the actress over the Time's Up movement.
"Remember when Hollywood actresses & paid off activists wore stupid black dresses at the Oscars? That was sponsored by Times Up who were meant to help abuse victims?" she wrote on Instagram.
"I told the world they are a lie 3+ years ago. I was mocked & harassed by so many who want to believe the illusion. Wake up. Hard truths are inconvenient & uncomfortable. So what, suck it up. Milano, TimesUp, fake performatives and profiteers."
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