Scarlett Johansson has reportedly called the FBI after alleged nude photos of her were stolen from her cell phone.

One picture appears to show her holding a towel with her butt reflected in a mirror, while another reveals her to be topless lying on a bed. Both pictures appeared on several websites on Wednesday (September 14), leading the FBI (Federal Bureau of Investigation) to be drafted by The Avengers star.

The 26-year-old actress' publicist has so far refused to comment on the probe or reveal if the images—which also feature one showing a tattoo the screen beauty has been pictured displaying before—are genuine, but her representatives contacted the agency because they believe a criminal act has taken place, according to TMZ.com.

Friends with Benefits co-stars Mila Kunis and Justin Timberlake are also thought to be the victims of hackers after photos of the pair, including a shirtless snap of the The Social Network actor, were leaked.

Laura Eimiller, of the FBI office in Los Angeles, explained: "The FBI is investigating the person or groups responsible for a series of computer intrusions involving high-profile figures."

Eimiller did not name any of the alleged victims "due to the pending nature of our investigation."

Earlier this year, a group of hackers were reported to have stolen nude photos from the phones of up to 50 celebrities, including Jessica Alba, Christina Aguilera, Miley Cyrus, and Vanessa Hudgens.

Vanessa met with FBI agents in March to discuss hacking of her emails.