Two nude photos of Scarlett Johansson, which were leaked on the Internet, immediately went viral, prompting the sexy actress to demand their removal.

One of them shows Johansson topless and the other shows her bottom. The photos were taken by Johansson herself and were saved in her cell phone. However, the cell phone was hacked by hackers, who leaked the photos on the Internet, according to the actress.

Johansson has asked the websites which have posted up her photos to remove the "stolen copyright protected private photographs" or face legal action.

"The highly personal and private photographs at issue capture our client self-posing in her own home in a state of undress and/or topless," Johansson wrote. "If you fail to comply, you will be acting at your own peril. Please govern yourselves accordingly."

Meanwhile, the FBI are investigating Johansson's accusations. “We are investigating a series of cyber intrusions of high-profile figures,” the FBI said.

Update: FBI Knows Identity of Scarlett Johansson's Nude Pictures Hacker [PHOTOS]

Scarlett Johansson has contacted the FBI after nude pictures of someone bearing a striking resemblance to actress appeared online.

A Florida man has been arrested in the hacking scandal that leaked personal photos of Scarlett Johansson. He is currently free on bail and prohibited from accessing the Internet.

Presenters Justin Timberlake and Mila Kunis perform a comedy bit at the 2011 MTV Movie Awards in Los Angeles, June 5, 2011.

Actress Scarlett Johansson poses at the 5th annual Spike TV's Guys Choice awards in Culver City, California June 4, 2011.

Actress Scarlett Johansson

10 Female Celebrities with Viral Nude Pics - Scarlett Johansson

Actress Scarlett Johansson arrives at the 49th Annual Grammy Awards in Los Angeles.

Cast member Scarlett Johansson attends the premiere of the movie "Iron Man 2" at El Capitan theatre in Hollywood, California April 26, 2010. The movie opens in the U.S. on May 7.

Johansson kisses her former husband Reynolds at the American Theatre Wing's 64th annual Tony Awards ceremony in New York.

Actress Scarlett Johansson arrives at the 2010 MTV Movie Awards in Los Angeles June 6, 2010.

Actress Scarlett Johansson arrives at the 68th annual Golden Globe Awards in Beverly Hills, California, January 16, 2011.