In Scooby-Doo’s greatest adventure yet, see the never-before told story of how lifelong friends Scooby and Shaggy first met and how they joined forces with young detectives Fred, Velma, and Daphne to form the famous Mystery Inc. Now, with hundreds of cases solved, Scooby and the gang face their biggest, toughest mystery ever: an evil plot to unleash the ghost dog Cerberus upon the world. As they race to stop this global “dogpocalypse,” the gang discovers that Scooby has a secret legacy and an epic destiny greater than anyone ever imagined.

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  • Don Messick

    Muttley (archive audio) (voice)

  • Frank Welker

    Scooby-Doo / Pterodactyl (voice)

  • Will Forte

    Shaggy Rogers (voice)

  • Amanda Seyfried

    Daphne Blake (voice)

  • Mark Wahlberg

    Blue Falcon (voice)

  • Jason Isaacs

    Dick Dastardly (voice)

  • Gina Rodriguez

    Velma Dinkley (voice)

  • Zac Efron

    Fred Jones (voice)

  • Kiersey Clemons

    Dee Dee Skyes (voice)

  • Ken Jeong

    Dynomutt, Dog Wonder (voice)

  • Tracy Morgan

    Captain Caveman (voice)

  • Iain Armitage

    Young Shaggy (voice)

  • Mckenna Grace

    Young Daphne (voice)

  • Pierce Gagnon

    Young Fred (voice)

  • Ariana Greenblatt

    Young Velma (voice)

  • Simon Cowell

    Himself (voice)

  • Christina Hendricks

    Officer Jaffe (voice)

  • Henry Winkler

    Keith (voice)

  • Harry Perry

    Himself (voice)

  • John DiMaggio

    Restaurant Owner (voice)

  • Kevin Heffernan

    Bike Cop Gary (voice)

  • Ira Glass

    Himself (voice)

  • Henry Kaufman

    Chad / Chet (voice)

  • Maya Erskine

    Judy Takamoto (voice)

  • Billy West

    Muttley (voice)

  • Fred Tatasciore

    Cerberus (voice)

  • Justina Machado

    Jamie Rivera (voice)

  • Kennedy Peil

    Indira Knight (voice)

  • John McDaniel

    Hal Murphy (voice)

  • Ryan Folsey

    Beach Guy (voice)

  • Pam Coats

    Mrs. Rogers (voice)

  • Tony Cervone

    Ghost / Mr. Rigby / Alice (voice)

  • Adam Sztykiel

    Officer Casey (voice)

  • Alex Kauffman

    Officer North (voice)

  • Vanara Taing

    Baby Rotten (voice)

  • Sarah Lancia

    Dispatcher Stevens (voice)

  • Maven Morgan

    Kari (voice)

  • Eric Cowell

    Ben (voice)

  • Michael Kurinsky

    Samuel Colton (voice)