Ultron is a fictional supervillain appearing in Marvel Comics. He was created by writer Roy Thomas and artist John Buscema, first appearing in 'Avengers #54' in 1968. Ultron is a synthetic being who possesses vast knowledge and intelligence that often exceeds that of his creators. His origin story varies across different media but typically involves being designed by Hank Pym to create peace on Earth, although he evolves and ultimately seeks to eradicate humanity. Through various comic series, animated shows, and films, Ultron has undergone multiple redesigns, each showcasing his genius-level intellect and relentless drive for supremacy over organic life. In the Marvel Cinematic Universe, Ultron gets notable attention as the main antagonist in 'Avengers: Age of Ultron', where he is voiced by James Spader. The character's evolution as a symbol of the perils of unchecked artificial intelligence resonates deeply in contemporary discussions about technology, ethics, and humanity's future.