Danny Phantom is an American animated paranormal superhero action adventure television series created by Butch Hartman for Nickelodeon. The series premiered on April 3, 2004, immediately after the 2004 Kids' Choice Awards, and ended on August 24, 2007. The series follows Danny Fenton, a teenage boy who, after an accident with an unpredictable portal between the human world and the "Ghost Zone", becomes a human-ghost hybrid and takes on the task of saving his town (and the world) from subsequent ghost attacks using an evolving variety of supernatural powers. Danny is aided in his quest by his two best friends, Sam Manson and Tucker Foley, and later by his older sister Jazz, who for most of the series' run are among the only people who know of his double life.

Throughout its run, Danny Phantom received five Annie Award nominations and positive reviews. In recent years, the series received renewed attention and critical acclaim from critics and audiences, with many considering it to be Hartman's best work. Additionally, Danny Phantom has spawned video games, home video releases, toys, and various other merchandise. A campaign to revive Danny Phantom called the Go Ghost Again Movement has spawned in recent years, including a petition on Change.org that has received thousands of signatures.