Scooby-Doo 2: Monsters Unleashed (also known as Scooby-Doo 2 or Scooby-Doo!: Monsters Unleashed) is a 2004 comedy horror adventure film directed by Raja Gosnell, written by James Gunn and released by Warner Bros. Based on the 1969–71 animated television series, Scooby-Doo, Where Are You?, it is the second installment in the Scooby-Doo live-action film series, and a sequel to 2002's Scooby-Doo. The returning cast features Freddie Prinze Jr.