There are a number of reports, stating that Scarlett Johansson has nude scenes, including some full-frontal) in Under The Skin, which has screened at Telluride and just today has screened at the Venice International Film Festival. The question is how much can actually be seen.
Here is a Hollywood Reporter review mentioning the full-frontal nudity:
"Johansson herself is not the source of the film's problems. She totally commits to the part, to the extent that she even performs several scenes of full-frontal nudity. Unfortunately, many, if not most, of the people who ultimately will check out this film will probably do so solely in order to check out those scenes."
http://www.hollywoodreporter.com/race/telluride-under-skin-starring-scarlett-618843
However, the blogger behind the Batty for Nudity blog contacted another reviewer of the film, and he mentioned that the view is not clear.
On the other hand, some brief mentions of the scenes from people elsewhere makes it sound like quite a bit is actually visible. This film is coming to the Toronto International Film Festival next week so hopefully we will definitely know by then what can actually be seen.