Mysterio (Quentin Beck) is a supervillain appearing in American comic books published by Marvel Comics. He is primarily depicted as an enemy of the superheroes Spider-Man and Daredevil. While Mysterio does not possess any superhuman abilities, he is a former special effects artist, illusionist and actor who uses his talents to commit crimes. He is a founding member of the supervillain team the Sinister Six.

The character has appeared in numerous media adaptations, including feature films, television series and video games. Jake Gyllenhaal portrayed Mysterio in the live-action Marvel Cinematic Universe film Spider-Man: Far From Home (2019), reappearing in archive footage in The Daily Bugle (2019, 2021) and Spider-Man: No Way Home (2021).