Suit up with the Iron Man movie series, the explosive origin of the Marvel Cinematic Universe. Starring Robert Downey Jr. as billionaire genius Tony Stark, these films follow his transformation from weapons manufacturer to high-tech hero after building the first Iron Man suit in captivity. With cutting-edge technology, razor-sharp wit, and evolving threats from both inside and outside his armor, Iron Man set the tone for the MCU’s blend of action, humor, and heart. From solo missions to Avengers leadership, Tony Stark’s legacy begins right here—with the arc reactor that started it all.