Frank Welker
Scooby-Doo / Pterodactyl (voice)
Zac Efron
Fred Jones (voice)
Amanda Seyfried
Daphne Blake (voice)
Will Forte
Shaggy Rogers (voice)
Gina Rodriguez
Velma Dinkley (voice)
Mark Wahlberg
Blue Falcon (Voice)
Ken Jeong
Dynomutt, Dog Wonder (voice)
Kiersey Clemons
Dee Dee Skyes (voice)
Tracy Morgan
Captain Caveman (voice)
Eli Ray
Young Fred (voice)
Jason Isaacs
Dick Dastardly (voice)
Iain Armitage
Young Shaggy (voice)
Mckenna Grace
Young Daphne (voice)
Ariana Greenblatt
Young Velma (voice)
Simon Cowell
Himself (voice)
Christina Hendricks
Officer Jaffe (voice)
Henry Winkler
Keith (voice)
Harry Perry
John DiMaggio
Resturant Owner (voice)
Kevin Heffernan
Bike Cop Gary (voice)
Ira Glass
Henry Kaufman
Chad / Chet (voice)
Maya Erskine
Judy Takamoto (voice)
Billy West
Muttley (voice)
Don Messick
Muttley (archive audio) (voice)
Fred Tatasciore
Cerberus (voice)
Justina Machado
Jamie Rivera (voice)
Kennedy Peil
Indira Knight (voice)
John McDaniel
Hal Murphy (voice)
Ryan Fosley
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)
