House star Amber Tamblyn reveals she was sexually assaulted by "abusive" ex boyfriend.

Actress Amber Tamblyn has joined thousands of women sharing their stories of sexual assault in the wake of a leaked video exposing Donald Trump for bragging about grabbing women “by the pussy”.

“I need to tell you a story. With the love and support of my husband, I’ve decided to share it publicly,” the House star’s lengthy Facebook post began.

“A very long time ago I ended a long, emotionally and physically abusive relationship with a man I had been with for some time.”

The 33-year-old, who is now married to fellow actor David Cross, was out seeing a DJ with friends in Hollywood when her ex appeared and confronted her on the dance floor.

“He’s a big guy, taller than me. The minute he saw me, he picked me up with one hand by my hair and with his other hand, he grabbed me under my skirt by my vagina— my pussy?— and lifted me up off the floor, literally, and carried me, like something he owned, like a piece of trash, out of the club,” she said.

“His fingers were practically inside of me, his other hand wrapped tightly around my hair. I screamed and kicked and cried. He carried me this way, suspended by his hands, all the way across the room, pushing past people until he got to the front door.”

Tamblyn’s friends ran after her, trying to stop him and eventually his brothers were able to intervene.

Amber Tamblyn with her husband David Cross. Source: Instagram

"In the scuffle he grabbed at my clothes, trying to hold onto me, screaming at me, and inadvertently ripped off my grandmother’s necklace, which I was wearing. The rest of this night is a blur I do not remember. How I got out to the car. How I got away from him that night. I never returned for my necklace either," she said.

While Trump continues to downplay his comments in the video as "locker room talk", Tamblyn — and many other women — know the pain and long-term damage intimate violence can cause.

Her post was accompanied by a photo of the Republican candidate kissing former Miss Universe Olivia Culpo.

Watch the leaked footage here. Post continues after video...

"That part of my body, which the current Presidential Nominee of the United States Donald Trump recently described as something he’d like to grab a woman by, was bruised from my ex-boyfriend's violence for at least the next week. I had a hard time wearing jeans. I couldn’t sleep without a pillow between my legs to create space," she said.

Tamblyn still feels the effects of the ordeal years later, saying she was afraid of how her parents might react to the story.

"But you understand, don't you? I needed to tell a story," she said.