As the New York Times reported, the plan may have just been unveiled but the celebrities had teamed up not long after the sexual misconduct allegations surfaced against disgraced Hollywood producer Harvey Weinstein - one of many powerful men who fell from grace in 2017 after their alleged victims found the courage to come forward and share their stories.
Reese Witherspoon, Nicole Kidman, Margot Robbie and Jennifer Aniston are among hundreds of Hollywood women who have formed an anti-harassment coalition called Time's Up.
"The struggle for women to break in, to rise up the ranks and to simply be heard and acknowledged in male-dominated workplaces must end; time's up on this impenetrable monopoly", the letter says. Rhimes told the New York Times.
While attention has largely focused on show business and the media, Time's Up seeks to include the plight of working-class women.
The meetings reportedly began in October, shortly after Harvey Weinstein was first accused of sexual assault.
Organisers said they were moved to broaden the effort after receiving an open letter on behalf of 700,000 women farm workers in November.
The initiative also requested women actors to wear black at the red carpet of the upcoming Golden Globes Awards. For years, we've sold these awards shows as women, with our gowns and colours and our lovely faces and our glamour. "That's not what this moment is about".
The Time's Up website details and defines what sexual harassment is, and what to do if it happens to you.
Other elements include support for legislation that would target companies that fail to halt harassment and a push for gender equity in talent agencies and film studios.
"To the members of Alianza and farmworker women across the country, we see you, we thank you and we acknowledge the heavy weight of our common experience of being preyed upon, harassed and exploited by those who abuse their power and threaten our physical and economic security", Time's Up said. The fund has already received $13 million in donations.