AceShowbiz -

Sienna Miller is the latest victim of recent celebrity hacking scandal. X-rated photos of the 35-year-old British actress have been leaked by cyber geeks, who obtained private photos of celebrities by cracking the passwords of cloud storage accounts, social media sites or messaging services belonging to the stars and their friends.

The images purportedly of Sienna's show the "American Sniper" actress topless while wearing a mask over her face. It's unclear for what purpose those pictures were taken or to whom they were sent. A source tells The Sun, "Sienna will be devastated these pictures said to be of her fooling around have been put online by some weirdo."

According to the site, the hackers use invite-only forums to talk to one another and share the files. "They sometimes post them online to show off and once they're online, it's hard to make them disappear again," says a source.

Sienna has not released a comment regarding the reported leaked pictures. Previously, private pictures of Emma Watson, Amanda Seyfried, Demi Lovato, Katie Cassidy, Lucy Hale, Rose McGowan, Miley Cyrus, Suki Waterhouse and more stars were leaked online.

The Sun reported that Kylie Jenner, Jennifer Lawrence, British actress Millie Mackintosh and English model Lacey Banghard were targeted next by the hackers.