(Cover) - EN Showbiz - Scarlett Johansson's cell phone has reportedly been hacked.

Nude photographs which purport to be the Hollywood actress were leaked onto the internet this morning.

The 26-year-old star is said to have contacted the FBI because she believes a criminal act has taken place, TMZ are reporting.

Several celebrities have already been caught up in alleged nude photo hacking scandals in the past year including Vanessa Hudgens, Miley Cyrus and Jessica Alba.

The pictures of Scarlett appear to be self portraits and include the actress draped in a towel but with her backside exposed which is reflected in a mirror.

Another image seems to show a topless picture of the Golden Globe winning actress that she appears to have taken herself.

Three months ago naked photos that the hackers alleged to be Blake Lively surfaced.

The Gossip Girl star denied the pictures were of her and threatened to sue any web site that published the images. (C) Cover Media