Gwendolyne Maxine "Gwen" Stacy first appeared in The Amazing Spider-Man #31 (December 1965), created by Stan Lee and Steve Ditko, as a college classmate and eventual romantic interest of Peter Parker. Introduced as a beautiful, intelligent science major and daughter of NYPD Captain George Stacy, she quickly became Spider-Man's primary love interest during the Silver Age, representing an ideal of sophistication and emotional support amid Peter's chaotic life. Her relationship with Peter deepened, but tensions arose from his secret identity and her initial disdain for Spider-Man, whom she blamed for her father's death in a battle with Doctor Octopus.
Gwen's most pivotal development occurred in "The Night Gwen Stacy Died" storyline (*The Amazing Spider-Man* #121–122, June–July 1973), written by Gerry Conway with art by Gil Kane and John Romita Sr., where she was kidnapped by the Green Goblin (Norman Osborn) and killed during a bridge confrontation, her neck snapping from the fall despite Spider-Man's attempt to save her. This event marked a turning point in superhero comics, ending the Silver Age's innocence and emphasizing irreversible consequences, profoundly traumatizing Peter and shifting his relationships toward Mary Jane Watson.
Posthumously, Gwen has been revived multiple times through cloning (notably in the 1970s Clone Saga and 2016's "Dead No More: The Clone Conspiracy"), brief resurrections, and alternate-universe variants, most prominently the popular Earth-65 Spider-Gwen (debuting in Edge of Spider-Verse #2, 2014), who gained spider powers instead of Peter and became Ghost-Spider. As of late 2025, the original Gwen was resurrected again in The All-New All-Deadly Gwenpool series as a violent Weapon X-enhanced variant (X-31), while Spider-Gwen continues in relaunched titles like All-New Spider-Gwen: Ghost-Spider, solidifying her enduring legacy as a symbol of tragedy and multiversal heroism.