Emma Stone, The Amazing Spider-Man
Credit: Kevin Mazur/WireImage; Seth Poppel/Yearbook Library

Break out the popcorn: The Amazing Spider-Man opens tonight at midnight! Emma Stone plays the superhero's love interest Gwen Stacy—a role that required her to trade in her signature red locks for an icy blond 'do. Click through the gallery to see Stone's beauty transformation from Hollywood newcomer to summer blockbuster star.