Thanks to a newly published report from Deadline to commemorate the first Iron Man’s release 10 years ago, it’s revealed that RDJ actually improvised his iconic “I am Iron Man"line at the end of the film. MCU fans will remember the moment as it perfectly caps off the movie, solidifying Stark’s rock star image. Ironically, the scene also saw the genius billionaire not following what was written on the statement prepared by S.H.I.E.L.D. agent Phil Coulson. The quote became so memorable that he would again deliver it at the end of Shane Black’s Iron Man 3.