Los Angeles, Mar 23 (IANS): Actors Zac Efron and Amanda Seyfried have been roped in to voice the characters of Fred Jones and Daphne Blake respectively in the upcoming animated Scooby-Doo feature film "Scoob".

It was revealed earlier this month that Will Forte is set to voice Norville "Shaggy" Rogers, while Gina Rodriguez would be voicing Velma Dinkley, reports variety.com.

The mystery-solving teens and their talking Great Dane Scooby-Doo first appeared half a century ago on the animated TV series "Scooby-Doo: Where Are You?," which was created by Hanna-Barbera and first aired in 1969.

Plot details of the movie involve the Scooby-Doo characters teaming up with other characters in the Hanna-Barbera universe to save the world from the evil Dick Dastardly.

Tony Cervone is directing "Scoob." His credits include "Space Jam", Cartoon Network's "The Looney Tunes Show" and "Scooby-Doo! Mystery Incorporated".

"Scoob" will open on May 15, 2020.

The 2002 "Scooby-Doo" movie mixed live action actors with Scooby himself, who was computer-generated, as did "Scooby-Doo: Monsters Unleashed" two years later.