Nicole Kidman, Reese Witherspoon, Margot Robbie and Jennifer Aniston are among hundreds of Hollywood women who have formed an anti-harassment initiative called Time's Up.
The group of 300 women behind the effort to fight sexual harassment in workplaces is made up of successful producers, agents, writers, directors and executives and also includes actresses Eva Longoria, Emma Stone, Ashley Judd and America Ferrera.
Part of the action plan, which the stars announced with a full-page ad in the New York Times, includes a $17m legal defence fund to help women in less privileged professions.
“If this group of women can’t fight for a model for other women who don’t have as much power and privilege, then who can?” Grey's Anatomy creator Shonda Rhimes told the publication.
Since the announcement, other celebrities have rushed to throw support behind the campaign, including singer Justin Timberlake who praised the idea.
Others include Taylor Swift who donated $100,000 to the legal funds and Meryl Streep who generously gave $500,000.
The powerful ad in the NYT addressed how tough it was for women to break through the glass, saying the male "monopoly" was over.
"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," it said. "Time’s up on this impenetrable monopoly."
A light was first shone on the issue of sexual harassment in the showbiz industry when allegations of misconduct were made against movie mogul Harvey Weinstein.
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