According to The Hollywood Reporter among others, Gweneth Paltrow has signed on to join the cast of Iron Man! She will play the role of Tony Stark/Iron Man 's secretary Virginia "Pepper" Potts. Since I haven't really red much Iron Man I don't know too much about her other than she has been a long time on again off again love interest for Tony. I love Gweneth, how can you not, and honestly with her alongside the likes of Robert Downey Jr, and Terrance Howard, I think this film is really on the right track. I'm sure we'll hear more on Gweneth's role as time progresses. Sounds promising to me though.