For members of an industry that’s long seemed more inclined to talk-the-talk than walk-the-walk, Hollywood’s new anti-harassment initiative is substantial.

Announced Monday, the initiative will be organized under the banner of Time’s Up, a recently-formed group that reportedly includes “300 prominent actresses and female agents, writers, directors, producers and entertainment executives.” Among the many members are top names including Reese Witherspoon, Ashley Judd, Kerry Washington, Emma Stone, and Michelle Obama’s former chief of staff Tina Tchen.