A representative for the Oscar-winning Hunger Games actress confirmed that nude images of Jennifer circulating the internet were genuine.
It's believed the images surfaced after her phone was hacked.
"This is a flagrant violation of privacy," said the spokesperson. "The authorities have been contacted and will prosecute anyone who posts the stolen photos of Jennifer Lawrence."
Jennifer, 24, wasn't the only celebrity targeted.
A post appeared on an online message board over the weekend claiming to have dozens of naked pictures of several famous faces including Kate Upton, Ariana Grande, Victoria Justice and Mary Elizabeth Winstead.
While some stars, including Jennifer, have confirmed their pictures to be real, others have denied their authenticity.
Actress Mary Elizabeth reacted angrily to the leak via Twitter, blasting: "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.
"Knowing those photos were deleted long ago, I can only imagine the creepy effort that went into this. Feeling for everyone who got hacked."
She later added: "Just definitely a hackjob, not being released by someone who knows these actresses. For sure."
A rep for Ariana, meanwhile, said the purported nude pictures of her were not real, while Nickelodeon star Victoria took to Twitter to issue her own denial.
"These so called nudes of me are FAKE people. Let me ni[ this in the bud right now. Pun intended."
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