Collins officially pleaded guilty to a felony violation of the Computer Fraud and Abuse Act and to one count of unauthorized access to a protected computer to obtain information.
In some cases, he also downloaded entire Apple iCloud backups.
The photos first appeared on sites such as 4Chan and Reddit.
They show a woman who resembles the star taking nude selfies in a bathroom setting.
Targeted: Kaley Cuoco left , who plays Penny in The Big Bang Theory right , was named as a victim last month According to , the images were reportedly uploaded to 4chan and Reddit, but the latter quickly removing them due to its stringent policy on hacked photographs being shared on the site.
One day after nude photos were released online, nude photos of Rihanna, Meagan Good, Kim Kardashian, Kate Bosworth, Hayden Panettierre and Jennifer Lawrence were also leaked.