Random Trivia For This Title:
- Gemma Arterton, Diane Kruger and Isla Fisher were considered for the role of Maya Hansen. [?] Jessica Chastain was cast but she dropped out due to scheduling conflicts. Rebecca Hall was cast in her place.
- Shane Black admitted that Jon Favreau gave him tips and advice during filming (for which he was very grateful and thankful) though noted that this film would have a "different feel" from the other two.
- The film's post-credits scene was originally meant to have Tony Stark blasting off into space to meet the Guardians of the Galaxy. Iron Man was going to have a cameo role in Guardians of the Galaxy (in homage to his being the Guardians' latest member in the comics), but this was scrapped when Robert Downey Jr. said he may not reprise his role as Tony Stark in the future. Instead, Bruce Banner appeared in the post-credits scene.
- Anthony Mackie read for a part, presumably Eric Savin or Jack Taggart, but did not get the role. He would later play Falcon in Captain America: The Winter Soldier.
- Including the bonus post-credits scene in The Incredible Hulk, this is Robert Downey Jr.'s fifth portrayal of Tony Stark/Iron Man. This briefly tied him with Hugh Jackman's and Samuel L. Jackson's record of theatrical appearances as a comic character; however, Jackman retook the record less than three months after IM3's release with his role in The Wolverine.
- The attack on the Chinese Theatre also holds a special significance, as Firepower is sitting right next to the hand-prints and signature of Robert Downey Jr.
- The first day Robert Downey Jr. and Sir Ben Kingsley met on set, they snapped a photo together to send to director and mutual friend Lord Richard Attenborough.
- The film was heavily edited for Chinese audiences, the Chinese edit has additional scenes featuring the character Dr. Wu and his assistant (played by Chinese stars Xueqi Wang and Bingbing Fan respectively).
- Tony tells a young child with glasses that he loved him in A Christmas Story. Peter Billingsley, who played Ralphie in ACS, was an executive producer on Iron Man and played a small role in the first film.
- In the comics, the Iron Patriot was an alias used by Spider-Man's nemesis, the Green Goblin Norman Osborn. In this film, it is War Machine painted in a resemblance of Captain America's suit. [?] Kevin Feige described it as a post-The Avengers government response: "These crazy heroes the Avengers saved the day, not the government. The government felt they needed a hero of their own - they have a military officer that has one of these suits, and they paint it red, white, and blue. It gave us a place to go with Rhodey and his split loyalties between his friend and his duty, and you also get to be reminded of the trust and friendship between Rhodey and Stark in great buddy-cop fashion."
- Jude Law (Robert Downey Jr.'s co-star in Sherlock Holmes and Gwyneth Paltrow's co-star in Sky Captain and the World of Tomorrow) was considered for the role of Aldrich Killian.
- Robert Downey Jr. pushed to get Gwyneth Paltrow to have some action scenes, and [?] Kevin Feige approved: "We are bored by the damsel in distress. But sometimes we need our hero to be desperate enough in fighting for something other than just his own life. So, there is fun to be had with 'Is Pepper in danger or is she the savior?' over the course of this movie."
- [?] Jessica Brown Findlay who appears in the film due to the use of footage from [Downton Abbey] was actually considered for a part in another Marvel film; the role of Sharon Carter in Captain America: The Winter Soldier.
- The idea that Happy Hogan's favorite television show is [Downton Abbey] was at the suggestion of Jon Favreau, who is actually a big fan of the British series.
- Near the beginning of the movie you see Tony Stark strike a mook jong or wing chun wooden dummy. Robert Downey Jr. has been training in wing chun for several years under Sifu Eric Oram and has also used it in Sherlock Holmes. He has also stated he will be testing for his black belt soon.
- This is the first film in the series not to be directed by Jon Favreau, who turned down the offer for Iron Man 3. He later admitted that not directing allowed him to have more fun with his character Happy Hogan, saying that he was like "a proud grandfather who doesn't have to change the diapers but gets to play with the baby."