Twitter has restored actress Rose McGowan's account after temporarily suspending it and causing an outcry it had muted one of the central figures in the allegations against Harvey Weinstein.

The episode, Twitter said, was because McGowan tweeted a private phone number, a practice it said violated its service terms.

The company said it will "be clearer about these policies and decisions in the future".

McGowan has alleged Weinstein sexually assaulted her in 1997, and as more women have come forward with similar allegations in recent days, she has used Twitter to share the stories and lead a charge against Weinstein.

Rose McGowan took to Instagram to share the news of her Twitter suspension. ( Instagram: Rose McGowan )

"THERE ARE POWERFUL FORCES AT WORK," McGowan posted on Instagram, revealing her Twitter suspension.

After the New Yorker ran an exposé, which included the report that Weinstein had allegedly sexually assaulted three women, McGowan tweeted "now I am allowed to say rapist".

"Any allegations of non-consensual contact are unequivocally denied by Mr Weinstein," Weinstein representative Sallie Hofmeister said.

In recent posts, McGowan told Ben Affleck — who also has been forced to apologise after video of him groping a woman re-emerged — to "f*** off" and called Weinstein's brother Bob a "POS".

Sorry, this video has expired Ben Affleck was forced to apologise over this 2003 incident

McGowan started an online petition to try to dissolve The Weinstein Company — which currently has over 11,000 signatures — and encouraged her #RoseArmy to help her "slay dragons".

"[The Weinstein Company] You don't get to change your company name and be done with it," McGowan tweeted.

"Every man there has the blood of sorrow on their hands. You are dirty."

She also called Affleck a liar on Tuesday, after the Good Will Hunting actor expressed his disgust when learning of Weinstein's indiscretions.

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The list of people to have accused Weinstein of sexual misconduct now includes model and actor Cara Delevigne, and actors Angelina Jolie and Gwyneth Paltrow.

Weinstein has reportedly reached eight settlements with women in the past 30 years after being confronted with allegations of sexual harassment, according to The New York Times.