The Iron Man 2 casting rumors have become a reality.

A rep for Scarlett Johansson has confirmed that actress will play Black Widow in the sequel, which is scheduled for a May  2010 release.

"Scarlett is thrilled to be a part of Iron Man," the rep told E! Online.

Meanwhile, after a series of negotiations, Mickey Rourke has also agreed to his much-rumored role: he'll portray the villain Whiplash.

Iron man 2 will also bring back Gwyneth Paltrow returning as Pepper Potts, along with Samuel L. Jackson as Nick Fury and Don Cheadle as Col. James "Rhodey" Rhodes.