"The mass shooting in Las Vegas has all of us grieving, scared and angry," Ms. Stone says.
Emma Stone, Hollywood actors release new anti-gun ad: 'Reject the NRA's dangerous agenda' →
She added: "Girls are brought up to be perfect and boys are brought up to be brave. Well, a girl can never be perfect. So we never can win."
Billie Jean King says she's upset with women who voted Trump →