Mjolnir, known more formally as Mjölnir is a fictional magical weapon appearing in American comic books published by Marvel Comics. It is depicted as the principal weapon of the superhero Thor. Mjolnir, which first appears in Journey into Mystery #83, was created by writers Stan Lee and Larry Lieber and designed by artists Jack Kirby and Joe Sinnott.

Thor Odinson is a superhero appearing in American comic books published by Marvel Comics. Created by artist Jack Kirby, writer Stan Lee, and scripter Larry Lieber, the character first appeared in Journey into Mystery #83 (1962) and first received his own title with Thor #126 (1966). Thor is an adaptation of the deity of the same name from Norse mythology, and many aspects of Thor's character are based on Norse myth. Comic books featuring Thor have been published across several volumes since the character's introduction.