Green Lantern is an American superhero franchise centered on members of the Green Lantern Corps, an intergalactic police force that uses power rings fueled by willpower. The core concept follows different Lanterns, especially Hal Jordan, as they protect the universe from cosmic threats, criminal empires, and powerful entities. The franchise spans comics, animated series, films, and games, and is best known for its sci-fi action, space opera setting, and the iconic green power ring.