<Li> September 13, 2009 (2009 - 09 - 13) </Li> <P> Scooby - Doo! The Mystery Begins (also known as Scooby - Doo 3 or Scooby - Doo 3: The Mystery Begins) is a 2009 American made - for - television comedy film directed by Brian Levant, produced by Warner Premiere and distributed by Warner Home Video . The film aired on Cartoon Network on September 13, 2009, and later released on September 22, 2009 on DVD and Blu - Ray . It is the third installment in the Scooby - Doo live - action film series, revealing how the Mystery Inc. gang met and the events of their very first case . </P> <P> The live - action cast features Robbie Amell as Fred, Kate Melton as Daphne, Hayley Kiyoko as Velma and Nick Palatas as Shaggy . Scooby - Doo was created using computer - generated imagery and his voice is provided by Frank Welker, who also was a cast member of the animated series, Scooby - Doo, Where Are You! and The Scooby - Doo Show, providing the voice of Fred . </P> <P> The music is scored by Academy Award - nominee David Newman, who had previously scored the theatrical films Scooby - Doo (2002) and Scooby - Doo 2: Monsters Unleashed (2004). The film is dedicated to Lorena Gale, who died during production . </P>

Who played velma in scooby doo the mystery begins