Ultron was created by writer Roy Thomas and artist John Buscema, though Thomas has acknowledged that both the idea of the character and his appearance were heavily based on Mechano, an obscure villain who appeared in an issue of the "Captain Video" comic book.
Ultron was created by writer Roy Thomas and artist John Buscema. Thomas said the idea of the character and his appearance were heavily based on Mechano, an obscure robotic villain who appeared in an issue of the "Captain Video" comic book.