Private photos – including some nude pictures – allegedly featuring Jennifer Lawrence and a whole host of other Hollywood stars have been leaked online.
The images, which appear to have been hacked from the celebrities' phones, appeared on the 4chan message boards over the weekend.
Tens of photos have already begun circulating, with the anonymous hackers alleging that they have access to more nude images and videos of the likes of Rihanna, Kelly Brook, Cat Deeley, Jessica Brown-Findlay, Lea Michelle, Michelle Keegan, Kim Kardashian, Mary Kate Olsen, Cara Delevingne, Kate Bosworth, Selena Gomez, Vanessa Hudgens, Kirsten Dunst and Kaley Cuoco.
Some of the celebrities named have been quick to deny the images are of them. Actress Victoria Justice took to Twitter to deny the rumours:
Others have confirmed the invasion of their privacy and condemned the hackers.
Jennifer Lawrence's spokesperson released the following statement: "This is a flagrant violation of privacy. The authorities have been contacted and will prosecute anyone who posts the stolen photos of Jennifer Lawrence."
Kate Upton, who starred in recent rom com The Other Woman, has also been a victim of the hacking. Her spokesperson has criticised the "outrageous violation of our client Kate Upton's privacy," adding: "We intend to pursue anyone disseminating or duplicating these illegally obtained images to the fullest extent possible."
Die Hard and Final Destination 3 actress Mary Elizabeth Winstead reacted to the leaked photos of her on Twitter, calling them "photos I took with my husband years ago in the privacy of our home," and adding her sympathies for all the stars whose personal pictures have been hacked.