The main cast of the first Iron Man film included:
* Robert Downey Jr. as Tony Stark / Iron Man
* Gwyneth Paltrow as Pepper Potts
* Terrence Howard as James "Rhodey" Rhodes
* Jeff Bridges as Obadiah Stane
* Shaun Toub as Yinsen
While Ralph Fiennes is a well-known actor, he was not part of the Iron Man franchise.