Mysterio (Quentin Beck) is a fictional supervillain appearing in American comic books published by Marvel Comics. He serves as an enemy of Spider-Man. He is also 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. Mysterio made his live-action debut in the Marvel Cinematic Universe film Spider-Man: Far From Home (2019), portrayed by Jake Gyllenhaal.  In 2009, Mysterio was ranked as IGN’s 85th Greatest Comic Book Villain of All Time.