After months of virtual harassment, actress Sophia Bush is taking action against her "obsessive" stalker.

The 32-year-old former "One Tree Hill" star took to Instagram to share a collage of screenshots of comments made by her stalker on Instagram and Twitter. The Wrap reported that the owner of the account has spent months harassing both the actress and her fans.

"For the past few months I have been harassed to the point of sheer horror by an online stalker," she caption the post. "This person has taken to harassing and bullying many of my followers as well. And tonight I finally said f--k this s-t. This is what I posted to twitter. The photograph is a tiny sampling of over 500 screenshots I've taken in the last three months. And I'm sharing it here to make something very clear. This kind of behavior does. Not. Fly. You do not have permission to hide. Not anymore: This has gotten beyond out of hand. Obsessive. Violent. And legally punishable."

The "Chicago P.D." actress apologized to her fans, but added that even if the account is blocked, a new one will eventually be created.

In the post, Bush said she contacted the police who told her "we 're on it" and not to "acknowledge this person," but the actress became fed up when the "vitriolic perverse monster" began attacking her fans.

"Threatening rape, gang rape, & throat slitting to name a few?" she wrote. "Impersonating me and breaking some of your hearts? Telling people they should kill themselves, and detailing how? Nope. No silence. As the evidence of staking and harassment mounts, so does my anger. Because this is grotesque."

Bush then addresses her stalker directly, writing, "What happened to you, you poor lost soul, that this is how you find pleasure? That you need to attempt to destroy little bits of other people to build yourself up, bit by bit? Who in your life hurt you? Who made you need to act out like this? Because my god I feel so sorry for you. But my sorrow in the face of your pain is no match for my anger at the pain you are causing others."

"You do not have the right to spread poison because you have felt poisoned," she added. "It's a small minded and ugly path to take. Choosing to inflict pain doesn't make you strong or powerful. It only proves your weakness and self-loathing. All the time you're taking to verbally harass us, threaten physical assault, and terrorize strangers? Please start spending it in therapy and learn to love yourself. You deserve it. And because none of us deserve one more moment of your bullying bulls--t."

The former Partners added, "#gethelp #bullyingisugly #violenceisntfunny #thereisabetterway."