Kate's attorney, Lawrence Shire, released a statement to ET on Monday, saying, "This is obviously an outrageous violation of our client Kate Upton's privacy. We intend to pursue anyone disseminating or duplicating these illegally obtained images to the fullest extent possible."
The FBI gave the following statement to ET: "The FBI is aware of the allegations concerning computer intrusions and the unlawful release of material involving high profile individuals, and is addressing the matter. Any further comment would be inappropriate at this time."
This isn't the first time that celebrities have been hacked for their personal photos.
Scarlett Johansson, Mila Kunis, and Christina Aguilera were all hacked by e-mail. A Florida man named Christopher Chaney found their naked images in e-mails from November 2010 to October 2011 by resetting their e-mail passwords.
After pleading guilty to wiretapping and unauthorized access to a computer, Chaney was sentenced to 10 years in prison on December 17, 2012. He also was ordered to pay $76,000 to the victims.