Iron Man

This movie was the first of the many movies in Marvel's Cinematic Universe. The MCU has since exploded into several different franchises following different characters, as well as the "Avengers" films. Before all of that, there was just the comic character of Iron Man, and a casting of Robert Downey Jr. to play him. RDJ portrays the character of Tony Stark perfectly, bringing him to life, straight out of the comics. The movie shows the origins of the character, and his transformation into Iron Man. The action is exciting, the comedy is genuinly funny, and the story keeps you engaged throughout.