Since Andy Lau backed out as the villain Chen Lu (aka. Radioactive Man), Wang Xueqi has replaced him for the role in Iron Man 3. Chen Lu has the ability to control radiation in different ways, and works for another villain, The Mandarin (played by Sir Ben Kingsley).
Other newcomers to the series include Guy Pearce, Rebecca Hall, Ashley Hamilton, and James Badge Dale. Returning cast members are Gwyneth Paltrow, Don Cheadle, and Jon Favreau, and of course, Robert Downey, Jr. as Iron Man. The director of the movie is Shane Black.