Scooby-Doo and the Alien Invaders is a 2000 American direct-to-video animated science fiction romantic comedy mystery film. It is the third direct-to-video film based on Scooby-Doo Saturday morning cartoons. The film was produced by Hanna-Barbera. It is the third of the first four Scooby-Doo direct-to-video films to be animated overseas by Japanese animation studio Mook Animation. Unlike the previous films and despite the grimmer atmosphere, it has a lighter tone since it's real monsters that are on Mystery Inc.'s side and the disguised human beings are the main villains.

Scooby-Doo is an American media franchise owned by Warner Bros. Entertainment and created in 1969 by writers Joe Ruby and Ken Spears through their animated series, Scooby-Doo, Where Are You!, for Hanna-Barbera. The series features four teenagers: Fred Jones, Daphne Blake, Velma Dinkley, and Shaggy Rogers, and their talking Great Dane named Scooby-Doo, who solve mysteries involving supposedly supernatural creatures through a series of antics and missteps, while traveling using a brightly colored van called the "Mystery Machine". The franchise has several live-action films and shows.