AceShowbiz -

First look at Sienna Miller as a sexy belly dancer in "Just Like a Woman" has appeared in the latest issue of Entertainment Weekly. Sporting a dark bob hair, the "G.I. Joe: Rise of Cobra" actress is seen in the scanned picture showing off a dance move in a show-stopping green two-piece.

In the movie, the actress who's dating English actor Tom Sturridge plays a Chicago housewife who absconds with her belly-dancing teacher to Las Vegas to enter a dance competition. She gushed to the magazine, "The story [follows] her and a Muslim woman who also leaves a bad marriage, and they dance their way across America. It's a bit like 'Thelma & Louise'."

Miller shared that she's been practicing how to dance for three months in preparation to play her character in the movie. She admitted that she can "semi-belly dance now. Just in case everything doesn't go as planned with this acting thing!"

Back in March, the 29-year-old blond beauty told Deadline about her excitement to be involved in the Rachid Bouchareb-directed drama. "[Bouchareb] is one of the most exciting directors working today. He's one of those people who understand the medium of film in a way that's not manipulative but that's honest and raw," she said before adding, "As a director he's capable of anything. The kinds of films he makes are the ones I like to watch."

Having begun production since June 13 in New Mexico, "Just Like a Woman" is expected to hit U.S. theaters in spring 2012.