London, July 18 : Scarlett Johansson has ditched her blonde locks for a more fiery look to become The Black Widow in Iron Man 2.

The ‘red-haired’ sexy star squeezed herself into a skin-tight catsuit for the comic book sequel, reports The Sun.

Meanwhile, Robert Downey Jr returns as crime fighter Tony Stark a. k. a Iron Man and Gwyneth Paltrow as love interest Pepper Potts.

Mickey Rourke will play the role of vicious villain Whiplash and Samuel L. Jackson will appear as CIA agent Nick Fury in the film.

The film is slated for a May 2010 release. (ANI)