Guy pearce has joined the cast for "Iron Man 3", for which filming is set to start next May in North Carolina.In this part Stark continues his fight against evil by taking on a scientist who created a fatal virus.Robert Downey Jr., Scareltt Johansson, Gwyneth Paltrow and Don Cheadle all return to star in this part, while Sir Ben Kingsley was added to the mix.It is not yet confirmed what role will be Pearce playing or whether he will be good or evil.Iron Man 3 will be directed by Shane Black, and the film will hit theatres in May 2013.