London, May 11: Sienna Miller has ditched her usual blonde chic look to appear as a dark-haired villain in her latest movie.

The actress plays the role of the Baroness in the upcoming film adaptation of cartoon strip G. I. Joe.

The Alfie star''s makeover seemed to have added to her dark side as she portrays herself as a tough, leather-clad femme fatale in G. I. Joe: The Rise of Cobra The Baroness, reports the Sun.

As per the plot, the Baroness''s beauty goes hand in hand with her ruthlessness.

The movie is slated for a UK release in August this year. (ANI)