Mila Kunis appears to be the latest victim of a cell phone hacker ring thought to be responsible for stealing nude photos and videos from at least 50 female celebrities, according to website TMZ.

Earlier today TMZ reported that Scarlett Johansson has asked the FBI to investigate how nude photos, which she appears to have taken of herself, were leaked on a website today.

Johansson’s reps didn’t respond to a request for comment. Nor did the FBI.

Mila Kunis’ rep did not give an immediate response to a request for comment.

According to TMZ, the person or persons behind Kunis’ cell phone hack have leaked four pictures to a website. Two show Justin Timberlake looking seductive. In one picture, he’s lying shirtless in bed. In another, he jokingly wears a pair of pink panties on his head.

There’s another photo of Mila in the bathtub, showing only her head. And one photo shows an unidentified nude man.

The hacker has also posted some texts which he claims are exchanges between Timberlake and Kunis.

Kunis and Johansson are not the first celebrities to have their phones hacked. Others include: Jessica Alba, Selena Gomez, Demi Lovato, Christina Aguilera, Vanessa Hudgens, Ali Larter, and Miley Cyrus.

TMZ reported earlier this year that the FBI was closing in on the ring believed to have broken into the accounts of stars’ cell phones and other computerized devices to obtain the compromising photos and videos.

If indeed, these photos of Johansson, Kunis and Timberlake are legit, one question remains: why are they taking nude or nearly nude photos on a cell phone?

Beth Jones, a senior threat researcher at the Internet security company Sophos, offered a suggestion to stars worried about becoming the victims of hackers.

“I hate to point out the obvious, but not taking nude photos on your phone is your first line of defense. Remember Polaroids?” Jones told ABCNews.com.