Gwen Stacy is a classmate and the girlfriend of Peter Parker and the daughter of chief police officer, George Stacy. She is portrayed by actress Emma Stone in the film The Amazing Spider-Man and its sequel, and appears in the non-canon video game said to take place between the two films.
"You see a lot of things when you work at Oscorp," Gwen Stacy once told Peter Parker in the midst of her internship under the tutelage of Curt Connors. At that point, the two were merely flirtatious classmates; Gwen once stopped high school bully Flash Thompson from beating up Peter just because he wouldn't take a picture of another boy getting bullied. However, their relationship was one that would truly blossom in the months to come. Just as things were getting interesting, however, the Lizard incident occurred.
When the Lizard planned to use reptilian DNA to turn the entirety of New York into humanoid lizards, Gwen helped Peter stop his plan by firstly, clearing out Oscorp when Lizard was on his way to get the serum he had made and then making a cure for the serum. Gwen hid in a small vent to prepare for the Lizard's arrival.
When the beast arrived, it sensed Gwen's presence and started searching for her. After finding her, Gwen jumped and, out of reaction, pulled out a small blowtorch and fired at the Lizard. He left, leaving Gwen unharmed, having already retrieved what he needed and left.
Soon, Peter revealed to Gwen his secret identity of Spider-Man and, soon after, the Lizard would take the life of her beloved father, Captain George Stacy, whose dying wish to Peter was that the two remain apart for her own protection. Peter had chosen to trust Gwen with his identity, mainly because, at the time, he thought she was the only friend he had.
Gwen later confronted Peter about her father's wish for them to be apart, but Peter was unresponsive to everything she had to ask at the moment. Despite this, Peter still chose to talk to Gwen and stay friends.
Note: the events occuring in the video game are non-canon toward the films, meaning they do not truly happen in the fictional film universe.
After the Lizard's defeat and her father's death, Gwen refused to forgive Connors. Instead, she buried herself in work, moving Oscorp's robotics division under the tutelage of the chivalrous and intelligent Alistaire Smythe. Still, she suspected something was up at Oscorp and snuck Peter in one evening to help her check things out. Little did she realize that Peter's arrival would spark a roit among Oscorp's remaining cross-species specimens and her infection with the cross-species virus.
Though sequestered to quarantine within Oscorp Tower, Gwen fought off her illness as best she could, as she did what she could from her position to help Spider-Man save the day. Whether updating Spidey on the level of contamination, hacking into computers, or reprogramming Smythe's robots to do her bidding, Gwen was on it. As dust settled and the city was cured, Gwen remembered how much she loved the guy behind Spider-Man's mask. She now visits Peter almost every day at his aunt's friend's apartment.
Gwen Stacy returns in the sequel to the first film, The Amazing Spider-Man 2, to aid her boyfriend in his battles with the threats of the Rhino andElectro, Manhattan's new evil villains.
In the comics, Gwen was killed by Norman Osborn as his supervillain identity, the Green Goblin. Ironically, she also had his children.
Gwen had never found out about Peter's identity as Spider-Man before she died.
It is speculated that Electro will murder Gwen in the second film, due to the current debate on whether or not the Green Goblin (Norman Osborn) will appear in the film.
Gwen is one of the few people to know Spider-Man's true identity; the others being Smythe (deceased), George Stacy (deceased) and Connors.
It is being considered by Sony that Gwen dies in the second film, The Amazing Spider-Man 2, thus, not appearing in its sequel.