Marvel Studios is celebrating the tenth anniversary of Iron Man this year.<br />Screen Rant reports that Downey dished on some behind the scenes secrets of the first film.<br />RDJ sat with Deadline and revealed he improvised his " I am Iron Man" line from end of Iron Man.<br />MCU fans will remember the moment as it perfectly caps off the movie.<br />The line solidified Stark's rock star image. <br />
