1. There are roughly 450 separate pieces that make up Iron Man's suit.

2. Hugh Jackman was offered the role of Iron Man. He was also offered the role of Hulk.

3. Director John Favreau set the film in California because he felt too many superhero films were on the East Coast, especially in New York.

4. Favreau wanted Robert Downey Jr. for the title role because he felt that the actor's past was perfect for the part. He said "the best and worst moments of Robert's life have been in the public eye. He had to find inner balance to overcome obstacles that went far beyond his career. That's Tony Stark."

5. Right before the final press conference, Tony Stark is seen reading a newspaper with a poor-quality photo of Iron Man on the cover. This is actually from a video shot by onlookers hiding in the bushes during the initial filming.