Spider-Man 3 is a 2007 superhero film written and directed by Sam Raimi, with a screenplay by Ivan Raimi and Alvin Sargent. It is the third film in the Spider-Man film franchise based on the fictional Marvel Comics character Spider-Man. The film stars Tobey Maguire, Kirsten Dunst, James Franco, Thomas Haden Church, and Topher Grace.

The film begins with Peter Parker basking in his success as Spider-Man, while Mary Jane Watson begins her Broadway career. Harry Osborn still seeks vengeance for his father's death, and an escaped convict, Flint Marko, falls into a particle accelerator and is transformed into a shape shifting sand monster. An alien symbiote crashes to Earth and bonds with Peter, influencing his behavior for the worse. When the symbiote is abandoned, it finds refuge in Eddie Brock Jr., a rival photographer, causing Peter to face his greatest challenge.

Spider-Man 3 was commercially released in multiple countries on May 1, 2007, and released in the United States in both conventional and IMAX theaters on May 4, 2007. The film received generally mixed reviews from critics, in stark contrast to Spider-Man 2's highly positive reviews, yet the film broke most of the opening weekend records, both in the United States, and in foreign markets, including records held in IMAX theaters.