We aren't exactly sure it's her; we do find it very uncanny that the face of whoever this is looks almost identical. If it isn't Johansson, she could definitely pass for a twin.

Johansson plays the superhero "The Black Widow" in the upcoming "Avengers" flick. Needless to say, she's big with the men. The photos are explicit and are not safe for work.

The photos allegedly show Johansson posing in front of the mirror while taking photos with her cell phone. She gives you a great view of all of her sexy lady lumps.

The FBI has reportedly been contacted but neither Johansson's rep nor the FBI have made a statement. This is just fueling the flames that these pictures are real.

So is this Johansson? Go HERE to see the Uncensored NSFW photos.