Sophia Bush opened up about sharing her experience of being assaulted in a room full of men and why she’s dedicated in speaking out against “abusive behavior” despite the impact it could have on her career.

Bush penned a lengthy Instagram post Friday about being an advocate for the #MeToo movement and incidents she’s endured throughout her acting career. She posted a poem by Nayyirah Waheed and screenshots of past tweets and Instagram captions speaking about her experiences and supporting other women telling their stories.

“I will always tell, and have always told, the truth. Even when my voice shakes,” Bush wrote in her Instagram caption. “…If you have chosen not to listen to the frank, clear conversations I’ve had on the topic over the last year, that’s on you. Your lack of attention — to me and to ALL of the women who tell their stories into the void — doesn’t mean that we haven’t been screaming all along.”

The actress vowed to continue to speak out about her experiences.

“The grace with which I’ve chosen to handle this, the deep learning I’ve done in the wake of my experience (shout out to the magnificent folks at @onsiteworkshops) that I take as sacred, and a responsibility to offer other women?” she wrote. “Do not forget that my ‘titanium spine,’ as my sister @hilarieburton calls it, was forged in fire. I am not a woman that you will ever reduce. Not one iota. None of us are.”

Bush previously talked about working in toxic environments while she was on “One Tree Hill” and “Chicago P.D.” Speaking on Dax Shepard’s podcast “Armchair Expert,” Bush said she was once assaulted in a room full of men who refused to help her while working on the NBC drama.

"You start to lose your way when someone assaults you in a room full of people and everyone literally looks away, looks at the floor, looks at the ceiling — and you're the one woman in the room and every man who's twice your size doesn't do something. You go, 'Oh that wasn’t worth defending? I'm not worth defending?'" Bush said earlier this month.

Bush also talked about her time filming “One Tree Hill” with Mark Schwahn, who was accused last December of sexual harassment by more than 40 women.

SOPHIA BUSH SAYS SHE WAS ASSAULTED IN ROOM FULL OF MEN, EXPLAINS WHY SHE LEFT ‘CHICAGO P.D.’

The actress said her situation on the "One Tree Hill" set was different from the experience she endured on "Chicago P.D."

"Our experience on 'One Tree Hill' was unpleasant, but our boss who was a bad dude lived in L.A.," Bush said. "Eighty percent of the time we were on set loving our experience and each other and then he would come to town and it'd be like, 'Watch out for f—ing Handsy-McHandsy over there.' There was a lot that was inappropriate but it wasn't all the time … it wasn't the same."

"One was like, a guy who we're like, 'Oh God, he's back.' And one was a consistent onslaught barrage of abusive behavior," she said about the difference between working on "One Tree Hill" and "Chicago P.D."