Emma Stone is Gwen Stacy
Fun fact: there isn't much fun to be said about Gwen Stacy. SPOILER WARNING: Don't read ahead if you don't want to know what happens in future Spider man movies. Gwen was Peter Parker's first love. they dated during high school and their romance was far greater than that of Peter's future girlfriend Mary Jane Watson. After Green Goblin discovers Spider-Man's identity, he kidnaps Gwen to a bridge and throws her off. Spider man catches her by shooting a web line to her foot, and under the impression that he saved her is relieved. Moments later he realizes that she was in fact dead, and proceeds to nearly beat Green Goblin to death. He manages to stop his rage only to have the Green Goblin impale himself with his glider and seemingly die. (he would not return for 300 issues) Peter is haunted by the idea that it was his webbing that caused Gwen's death by stopping her fall too suddenly and snapping her neck, and it is later confirmed that this is the case. He never forgave himself for this mistake. The original panel for those interested is here.