What is the title of the 2009 television film that tells how Scooby-Doo’s teenage friends first met?

The 2009 television film that tells how Scooby-Doo’s teenage friends first met is titled Scooby-Doo! The Mystery Begins. The film serves as a prequel-style origin story for the human members of Mystery Inc. and their relationship with Scooby.

Its plot follows the young characters as they become involved in a mystery and begin working together. The story focuses on the formation of the familiar team rather than presenting them as an already established investigative unit.

The film was made for television and features a different cast from the 2002 and 2004 theatrical live-action films. That distinction matters because the Scooby-Doo franchise has used multiple continuities and casting lineups across its live-action productions.

The title is sometimes confused with Scooby-Doo! Mystery Incorporated, an animated television series that premiered in 2010. They are separate productions: The Mystery Begins is a 2009 television film, while Mystery Incorporated is a later animated series.