( CNN ) -- A publicist for Jennifer Lawrence slammed the appearance of nude photographs of the Oscar-winning actress online Sunday as a `` flagrant violation of privacy . '' `` The authorities have been contacted and will prosecute anyone who posts the stolen photos of Jennifer Lawrence , '' the publicist said in a written statement . Posts on 4chan , Reddit , Twitter and Tumblr claim to include nude photographs of Lawrence , who won an Academy Award last year for her role in `` Silver Linings Playbook . '' Twitter posts on verified accounts of several other celebrities Sunday also reported hacks . `` 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 , '' actress Mary E. Winstead wrote . `` Knowing those photos were deleted long ago , I can only imagine the creepy effort that went into this . Feeling for everyone who got hacked . '' Some celebrities claimed the photos were doctored . An individual close to singer Ariana Grande told CNN photos claiming to show her are `` completely fake . '' And actress Victoria Justice said pictures purporting to be her are fake . This is n't the first time celebrities have accused hackers of stealing risque photos . A judge sentenced Christopher Chaney of Florida to 10 years in federal prison in 2012 for stealing nude photos , scripts and personal information from the e-mail accounts of 50 entertainment industry figures , including movie stars Scarlett Johansson and Mila Kunis and singer Christina Aguilera . The first real case of a celebrity hacking attack was in 2005 when hackers logged into Paris Hilton 's phone and stole photos of the reality star , Mikko Hypponen , chief research officer at computer security company F-Secure told CNN in 2011 . Those hackers reportedly were able to break into Hilton 's phone by correctly guessing the not-so-secret answer to her security question , which was `` tinkerbell , '' the name of her pet Chihuahua . CNN 's Rachel Wells , Dave Alsup , Alan Duke and John D. Sutter contributed to this report .
NEW : An individual close to Rita Grande says photos claiming to be her are ` ` completely fake '' Online photos purport to be nude photographs of actress Jennifer Lawrence . Her lawyer says it 's a ` ` flagrant violation of privacy '' and authorities have been contacted . Other celebrities also report they were contacted .