Lena Dunham has condemned a mystery hacker who leaked nude photographs of celebrities including Jennifer Lawrence.

The Hunger Games actress hit headlines on Sunday (31Aug14) when intimate snaps of her were posted on the Internet by a hacker who claims to have similar pictures of more than 100 female stars.

Now Girls actress Dunham has reached out to her fans and urged them to discourage the leaking of photos by not viewing them.

In a series of posts on Twitter.com, she writes, "The way in which you share your body must be a Choice. Support these women and do not look at these pictures... Remember, when you look at these pictures you are violating these women again and again. It's not okay... Seriously, do not forget that the person who stole these pictures and leaked them is not a hacker: they're a sex offender."

Lawrence and Mary Elizabeth Winstead have confirmed the authenticity of their snaps while condemning the breach of privacy. Like Lawrence, model Kate Upton's attorney is threatening legal action, 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.‎"

Ariana Grande and Victoria Justice claim the pictures of them are fake.