Over the weekend, several celebrities found themselves the target of online harassment after a hacker posted naked pictures of them online. However, alleged victims, including Jennifer Lawrence, Ariana Grande, Kate Upton and Victoria Justice, are coming out to defend themselves.

A representative for Lawrence released a statement to TMZ, saying that the pictures are "a flagrant violation of privacy. The authorities have been contacted and will prosecute anyone who posts the stolen photos of Jennifer Lawrence."

Actress Mary Elizabeth Winstead, one of the victims of the alleged hacking, responded to the leak on Twitter.

"To those of you looking at photos I took with my husband years ago in the privacy of our home, hope you feel great about yourselves," she wrote Sunday night. She added, "knowing those photos were deleted long ago, I can only image the creepy effort that went into this. Feeling for everyone who got hacked."

According to BuzzFeed News, Upton's lawyer Lawrence Shire confirmed that his client's nude photos are real and stated that the model plans to take legal action against those trying to share the images.

"This is obviously an outrageous violation of our client Kate Upton's privacy," Shire told BuzzFeed. "We intend to pursue anyone disseminating or duplicating these illegally obtained images to the fullest extent possible."

Justice has already responded via Twitter to the leak photos.

These so called nudes of me are FAKE people. Let me nip this in the bud right now. *pun intended*

— Victoria Justice (@VictoriaJustice) August 31, 2014

Grande also called the pictures fake, tweeting "hell nah.... praying for the people who believed that was me lmaoo... my petite ass is much cuter than that."

Other celebrities allegedly exposed online actresses include Kirsten Dunst, Krysten Ritter, Teresa Palmer, Becca Tobin, Yvonne Strahovski, Teresa Palmer, Mary Kate Olsen, Rihanna, Cara Delevigne and Gabrielle Union and soccer star Hope Solo.