Scoob!

Will Forte

as Shaggy Rogers (voice)

Frank Welker

as Scooby-Doo / Pterodactyl (voice)

Mark Wahlberg

as Blue Falcon (voice)

Jason Isaacs

as Dick Dastardly (voice)

Ken Jeong

as Dynomutt, Dog Wonder (voice)

Amanda Seyfried

as Daphne Blake (voice)

Gina Rodriguez

as Velma Dinkley (voice)

Zac Efron

as Fred Jones (voice)

Iain Armitage

as Young Shaggy (voice)

Ariana Greenblatt

as Young Velma (voice)

Mckenna Grace

as Young Daphne (voice)

Pierce Gagnon

as Young Fred (voice)

Kiersey Clemons

as Dee Dee Skyes (voice)

Tracy Morgan

as Captain Caveman (voice)

Simon Cowell

as Simon Cowell (voice)

Harry Perry

as Harry Perry (voice)

Kevin Heffernan

as Bike Cop Gary (voice)

Christina Hendricks

as Officer Jaffe (voice)

Henry Winkler

as Keith (voice)

John DiMaggio

as Restaurant Owner (voice)

Ira Glass

as Ira Glass (voice)

Henry Kaufman

as Chad / Chet (voice)

Maya Erskine

as Judy Takamoto (voice)

Billy West

as Muttley (voice)

Don Messick

as Muttley (archive sound) (voice)

Fred Tatasciore

as Cerberus (voice)

Kennedy Peil

as Indira Knight (voice)

John McDaniel

as Hal Murphy (voice)

Ryan Folsey

as Beach Guy (voice)

Justina Machado

as Jamie Rivera (voice)

Pam Coats

as Mrs. Rogers (voice)

Tony Cervone

as Ghost / Mr. Rigby / Alice (voice)

Alex Kauffman

as Officer North (voice)

Vanara Taing

as Baby Rotten (voice)

Sarah Lancia

as Dispatcher Stevens (voice)

Eric Cowell

as Ben (voice)

Maven Morgan

as Kari (voice)

Adam Sztykiel

as Officer Casey (voice)

Michael Kurinsky

as Samuel Colton (voice)