Scooby-Doo, Where Are You Now! (2021)

Frank Welker

as Scooby-Doo / Fred Jones / Self

Matthew Lillard

as Norville 'Shaggy' Rogers / Self - Voice of "Shaggy"

Grey DeLisle

as Daphne Blake / Self - Voice of "Daphne"

Kate Micucci

as Velma Dinkley / Self - Voice of "Velma"

Janel Parrish

as Janel Parrish - Host

Jerry Beck

as Self - Animation Historian and Author

David Silverman

as Self - Director and Producer, "The Simpsons"

Seth Green

as Self - Actor, "Scooby-Doo 2: Monsters Unleashed"

Tony Cervone

as Self - Director, "Scoob!" / Showrunner, "Mystery Incorporated"

Tom Sito

as Self - Animator, Historian

Joseph Barbera

as Self - Hanna-Barbera Co-Founder (archive footage)

Mary Lynn Rajskub

as Producer Bryn

Baron Vaughn

as Bram Penobscot - Scooby's Vocal Coach

Casey Kasem

as Shaggy Rogers (voice) (archive footage)

Diedrich Bader

as Batman - Concerned Citizen (voice)

'Weird Al' Yankovic

as Self - Singer, Songwriter, Accordionist

Olivia Liang

as Olivia Liang - Shaggy's Martial Arts Trainer

Karamo Brown

as Costume Designer Carter

M

Mitch Watson

as Self - Showrunner, "Mystery Incorporated"

Cheri Oteri

as Lazlo the Mechanic