Scoob!

Ira Glass as Ira Glass (voice) Pierce Gagnon as Young Fred (voice) Kiersey Clemons as Dee Dee Skyes (voice) Ken Jeong as Dynomutt, Dog Wonder (voice) Zac Efron as Fred Jones (voice) John DiMaggio as Restaurant Owner (voice) Fred Tatasciore as Cerberus (voice) Justina Machado as Jamie Rivera (voice) Frank Welker as Scooby-Doo / Pterodactyl (voice) Ariana Greenblatt as Young Velma (voice) Will Forte as Shaggy Rogers (voice) Kevin Heffernan as Bike Cop Gary (voice) Henry Winkler as Keith (voice) Jason Isaacs as Dick Dastardly (voice) Amanda Seyfried as Daphne Blake (voice) Gina Rodriguez as Velma Dinkley (voice) Tracy Morgan as Captain Caveman (voice) Christina Hendricks as Officer Jaffe (voice) Maya Erskine as Judy Takamoto (voice) Don Messick as Muttley (archive sound) (voice) Tony Cervone as Ghost / Mr. Rigby / Alice (voice) Mckenna Grace as Young Daphne (voice) Mark Wahlberg as Blue Falcon (voice) Iain Armitage as Young Shaggy (voice) Simon Cowell as Simon Cowell (voice) Billy West as Muttley (voice)

Tom Ruegger Art Designer, Visual Effects Designer Richard Suckle Executive Producer Charlie Puth Songs Jack Harlow Songs Pink Sweat$ Songs Lex Cassar Visual Development Tony Cervone Director Tom Holkenborg Original Music Composer Jack Donaldson Screenplay Chris Columbus Executive Producer Allison Abbate Producer Dan Povenmire Executive Producer Ava Max Songs Gabe Hilfer Music Supervisor Matt Lieberman Screenplay, Story Rico Nasty Songs Eyal Podell Story Charles Roven Executive Producer