It was preceded by 'The Incredible Hulk' but 'Iron Man' was the movie that was really responsible for kicking the Marvel Cinematic Unit into gear.
The 2008 film proved a hit with audiences and critics. Everyone agreed that Robert Downey Jr. was made to play Tony Stark.
Solo outing sequels for the superhero followed in 2010 and 2013 (with a few Marvel movies in between).
While there have been disagreements over which is the best of the series, one thing is for sure. As a trilogy, it really works, proving consistently entertaining, thrilling and even emotional (again, thanks to Downey) over the three movies.
Iron Man's story came to a conclusion not with the threequel but with last year's 'Avengers: Endgame'. It would seem we really have seen the end of Tony Stark.
Still, you can't blame us for looking back on what have to be three of the most enjoyable MCU installments.
So try it out for yourself, especially if you're as big a Marvel fan as we are - how well do you remember the trilogy?
No Goggling or other cheating, and let us know your scores in the comments.
