Agent Smith is the main antagonist of The Matrix trilogy and a posthumous antagonist in the 2005 video game The Matrix Online.
He is the leader of Agents, who later becomes a computer virus within the second and third films, as well as Neo's archenemy. He was created by The Architect along with his fellow Agents to protect the Matrix, but is freed from this purpose after Neo defeated him, leading him to turn on the Machines and set himself to destroy them along with mankind.
He was portrayed by Hugo Weaving.