Scooby-Doo is a 2002 American live-action comedy film based on the Hanna-Barbera television cartoon series of the same name about a group of young detectives and their talking dog. It is the first installment in the Scooby-Doo Live-Action film series. The film was directed by Raja Gosnell, produced by Charles Roven and Richard Suckle, and written by James Gunn and Craig Titley for Warner Bros.

The film stars Matthew Lillard as Shaggy, Sarah Michelle Gellar as Daphne, Freddie Prinze, Jr. as Fred, Linda Cardellini as Velma, and Neil Fanning as the voice of Scooby-Doo, along with Scott Innes as the voice of Scrappy-Doo and Rowan Atkinson as the owner of an island amusement park. Scooby-Doo and the other nonhuman characters were created on-screen using computer-generated imagery.

Reggae artist Shaggy and rock group MXPX perform different versions of the theme song. Shaggy got his stage name from a previous hairstyle of his he says, not from the character. In 2004, this film was followed by a sequel, Scooby-Doo 2: Monsters Unleashed.

A prequel, Scooby-Doo! The Mystery Begins, aired on Cartoon Network Sunday, September 13, 2009. A sequel, Scooby-Doo! Curse of the Lake Monster, aired on Cartoon Network on Saturday, October 16, 2010. The Scooby-Doo Spooky Coaster, a ride based on the film, was built in Warner Bros. Movie World in Gold Coast, Australia in 2002.

The film bears noticeable similarities to the 1998 animated film, Scooby-Doo on Zombie Island, in which Mystery Inc. split up but later reunite to solve a mystery that involves actual monsters. A similar storyline is the central plot of this film.