Action Comics #1 (cover dated June 1938) is the first issue of the original run of the comic book/magazine series Action Comics. It features the first appearance of several comic-book heroes—most notably the Jerry Siegel and Joe Shuster creation, Superman—and sold for 10 cents (equivalent to $2 in 2024). It is widely considered to be both the beginning of the superhero genre and the most valuable comic book in the world.