James Spader as Ultron : Here is a brief history on the character he plays after the Jump... A Chitauri artificial intelligence that was repurposed by Tony Stark and Bruce Banner for a pilot peace program, but is overwhelmed with a god complex and now desires to pacify the Earth by eradicating humanity.Director Joss Whedon stated that Spader was his "first and only choice" for the role, because of his "hypnotic voice that can be eerily calm and compelling" while also being very human and humorous. Feige clarified, "We'll be capturing his face and his body to create a whole performance... We did not hire James Spader to do a robot voice." Extensive scans were taken of Spader's head and body in preparation for the role. About the character Whedon said, "He's always trying to destroy the Avengers, goddamn it, he's got a bee in his bonnet. He's not a happy guy, which means he's an interesting guy. He's got pain. And