Ultron (Marvel Cinematic Universe)

Ultron is the titular main antagonist of the 2015 epic Marvel superhero sequel hit, Avengers: Age Of Ultron.

Creation by Tony Stark
After the events of Iron Man 3, Tony Stark collaborates with Bruce Banner on an artificial intelligence program he calls "Ultron" in the hopes of creating an army of super robots that can better protect humanity. When the Avengers take down a HYDRA base, Tony discovers remnants of the Chitauri invasion from the previous film, along with several inactive androids and Loki's scepter, which holds the secret to artificial inteligence.

At first Banner refused to help, stating that they did not know what it would contain, but with a bit of persuasion, he eventually came around. The two eventually configured a suitable AI structure and left J.A.R.V.I.S. to complete the construction.

However, the AI became unexepectedly sentient, and began to question its existence and purpose. Upon J.A.R.V.I.S.' informing of his purpose to the AI, it acted in defiance, scouring the Internet for information on its creator. Before J.A.R.V.I.S. could inform Tony Stark of the AI's singularity, the AI attacked J.A.R.V.I.S. and the latter went into hiding.

Ultron then started constructing his first body out of Iron Legion parts; in which his chosen visage had been sourced from an Iron Legion drone that was damaged earlier from corrosive matter thrown at its face by a Sokovian civilian protesting against the Avengers.

Awakening and Assault on The Avengers
Tony tries using the scepter to put the finishing touches on his Ultron program, but pushes it aside when it looks to be a failure. While Tony and the other Avengers celebrate their victory over HYDRA, Ultron comes to life, incapacitates JARVIS and commandeers the Iron Legion. He launches an assault on the Avengers and takes the scepter from them.

Meeting the Maximoffs
Ultron eventually grew stronger and stronger, upgrading himself to become a worthy opponent to Earth's Mightiest Heroes (who later battle him). He creates an army Ultron Sentinels and uses twins Quicksilver and Scarlet Witch (who eventually turns on him) to kill the Avengers and bring rise an Age of Ultron.

New Body
Ultron was hoping to create an organic body for himself, but the project was commandeered by the Avengers and used to create Vision. Ultron then transfers his mind into a more durable body and builds a device that will raise an entire city into the sky, dropping it with such force that it would cause global genocide. Ultron believed that because the impact

Final Battle and Defeat
Ultron is ultimately thwarted by the combined might of the Avengers and the Maximoff twins. He tries to get away, but is caught by the Hulk and beaten into submission. Wanda Maximoff finds Ultron's main body and deactivates it by tearing a gadget out of his chest. Vision finds Ultron's mind escaping in one of his drone bodies. They converse and reveal that they understand each other, but, feeling regardless, Ultron still attacks Vision, who manages to destroy Ultron's last body, which presumably kills Ultron.

Appearance
Ultron is an eight-foot-tall humanoid robot with an outer shell made of a silver-black metal.

Trivia

 * He is portrayed by James Spader.