DC Comics, Inc. is an American comic book publisher. It is the publishing unit of DC Entertainment, a subsidiary of the Warner Bros. Global Brands and Experiences division of Warner Bros., a subsidiary of AT&T's WarnerMedia. DC Comics is one of the largest and oldest American comic book companies. The majority of its publications take place within the fictional DC Universe and feature numerous culturally iconic heroic characters, such as Superman, Batman and Wonder Woman. The universe also features well-known supervillains who oppose the superheroes such as Lex Luthor and the Joker.