Freddie Prinze Jr.

Fred

Sarah Michelle Gellar

Daphne

Matthew Lillard

Shaggy

Linda Cardellini

Velma

Neil Fanning

Scooby-Doo Voice / Tasmanian Devil (voice)

Seth Green

Patrick

Peter Boyle

Old Man Wickles

Tim Blake Nelson

Jacobo

Alicia Silverstone

Heather

Pat O'Brien

Pat O'Brien

Bill Meilen

Chauffeur

Zahf Paroo

Ned

Chris Gauthier

Daphne's Tattooed Fan #1

Peter New

Daphne's Tattooed Fan #2

Morgan Brayton

Mullet Nerdette #1

Lisa Ann Beley

Mullet Nerdette #2

Tara Fynn

Mullet Nerdette #3

Brandon Jay McLaren

Skater Dude #2

Aaron Ydenberg

Skater Dude #3

Joe MacLeod

Skater Dude #1

Lou Bollo

Flashback Security Guard #1

John Ulmer

Flashback Security Guard #2

Bradley Gosnell

Kid on Bike #1

Calum Worthy

Kid on Bike #2

Brenna O'Brien

Buttercup Scout

Mark Burgess

Man in Suit

Kwesi Ameyaw

Man in Suit

Ted Kozma

Museum Guard

Darrell Lee-Izeard

Museum Guard

Stephen E. Miller

C.L. Magnus

Karin Konoval

Aggie Wilkins

Paul Jamieson

Scared Man

Andrew McIlroy

Investor

Colin Foo

Investor

Andrew Jackson

Man in Car

Nazanin Afshin-Jam

Shaggy Chick

Cascy Beddow

Young Shaggy

Emily Tennant

Young Daphne

Ryan Vrba

Young Fred

Lauren Kennedy

Young Velma

Jeff Tanner

Harry Lang

A.C. Peterson

Faux Ghost Patron

Dan Joffre

Faux Ghost Patron

Richard Dietl

Pickle Man/Faux Ghost Patron

Bill Mondy

Vomit Reporter

Kimani Ray Smith

Reporter #1

Catherine Lough Haggquist

Reporter #2

Ingrid Torrance

Reporter #3

Tiffani Timms

Reporter #4

Scott McNeil

Evil Masked Figure (voice)

Kevin Durand

Black Knight Ghost

C. Ernst Harth

Miner 49er

Christopher R. Sumpton

Zombie

Ruben Studdard

Ruben Studdard

Dee Bradley Baker

10,000 Volt Ghost / Zombie / Red Eye Skeleton (voice)

Bob Papenbrook

Black Knight (voice)

Michael Sorich

Tar Monster / Cotton Candy Glob (voice)

Terrence Stone

10,000 Volt Ghost (voice)

J.P. Manoux

Scooby Brainiac (voice)

Wally Wingert

Green-Eyed Skeleton (voice)