Scooby-Doo, Where Are You Now!

Frank Welker Scooby-Doo / Fred Jones / Self

Matthew Lillard Norville 'Shaggy' Rogers / Self - Voice of "Shaggy"

Grey DeLisle Daphne Blake / Self - Voice of "Daphne"

Kate Micucci Velma Dinkley / Self - Voice of "Velma"

Janel Parrish Janel Parrish - Host

Jerry Beck Self - Animation Historian and Author

David Silverman Self - Director and Producer, "The Simpsons"

Seth Green Self - Actor, "Scooby-Doo 2: Monsters Unleashed"

Tony Cervone Self - Director, "Scoob!" / Showrunner, "Mystery Incorporated"

Tom Sito Self - Animator, Historian

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

Mary Lynn Rajskub Producer Bryn

Baron Vaughn Bram Penobscot - Scooby's Vocal Coach

Casey Kasem Shaggy Rogers (voice) (archive footage)

Diedrich Bader Batman - Concerned Citizen (voice)

'Weird Al' Yankovic Self - Singer, Songwriter, Accordionist

Olivia Liang Olivia Liang - Shaggy's Martial Arts Trainer

Karamo Brown Costume Designer Carter

Mitch Watson Self - Showrunner, "Mystery Incorporated"

Cheri Oteri Lazlo the Mechanic