Here's the voice cast of Scoob! and where you know them from. Scoob! is the first feature-length animated Scooby-Doo film ever made. It finally reveals the origins of Mystery Inc. and explores their early days like they were never seen before.
Scoob! takes the gang on their biggest adventure yet when the three-headed ghost dog Cerberus threatens to unleash havoc upon the world. Various popular Hanna-Barbera characters join them in their battle to prevent the dogpocalypse, and they find that Earthly mysteries are now a thing of the past.
From Futurama to Les Misérables, the voice cast of Scoob! is filled with talent from all over film and TV. Here's the catalog of characters in the movie and their respective voice actors.
Mystery Inc. Team
Will Forte as Shaggy Rogers: The SNL alum, best known for creating and starring in The Last Man on Earth, also voiced Abraham Lincoln in The LEGO Movie as well as Tyler the Cute Biker in Gravity Falls. He plays Scooby-Doo's cowardly but lovable friend.
Gina Rodriguez as Velma Dinkley: Known for starring in Jane the Virgin and failing to survive the 2018 horror film Annihilation, Rodriguez takes up the part of the bespectacled geek.
Zac Efron as Fred Jones: The brave leader of Mystery Inc. is played by the Charlie St. Cloud star, famously remembered as Troy in the High School Musical series. Zac Efron previously lent his voice for the TV series Human Discoveries.
Amanda Seyfried as Daphne Blake: With credits as Cosette in Les Miserables and Karen Smith in Mean Girls, Amanda Seyfried takes another shot at voice acting after 2013's Epic. She plays the fashion-loving Daphne.
Frank Welker as Scooby-Doo: The veteran voice actor is the only member of the cast to reprise his original role. Besides voicing Scoob, he's the iconic voice of Garfield, Curious George, and Megatron in the Transformers cartoons. He voiced Fred since 1969 but only portrays Scooby in Scoob!
An important part of Scoob! is the appearance of Mystery Inc. as children. These are the actors who portray them:
Iain Armitage as Young Shaggy: The titular character in the Big Bang Theory sequel spinoff Young Sheldon also plays the young version of Shaggy in Scoob!
McKenna Grace as Young Daphne: Similarly, the young version of the titular character in Chilling Adventures of Sabrina plays the young version of Daphne.
Pierce Gagnon as Young Fred: The voice behind the little leader debuted in voice acting in Boss Baby: Back in Business after playing Sonny Jim in David Lynch's Twin Peaks.
Ariana Greenblatt as Young Velma: The actress who played young Gamora in Avengers: Infinity War plays the part of the young geek.
Hanna-Barbera Characters
Mark Wahlberg as Blue Falcon: The A-list star of The Departed and Tranformers: Age of Extinction makes his debut in voice acting as the son of the original cartoon superhero.
Jason Isaacs as Dick Dastardly: Famously remembered as Lucius Malfoy in the Harry Potter franchise. Isaacs has voiced multiple animated characters in the past, such as Inquisitor in Star Wars Rebels and Superman in Superman: Red Son. He plays the main villain in Scoob!, distinguished for his trickery.
Kiersey Clemons as Dee Dee Skyes: The "Teen Angel" that originally defrosted Captain Caveman is portrayed by Lady's human owner from the live-action adaptation of Lady and the Tramp.
Ken Jeong as Dynomutt: Known for his comedic roles in the acclaimed TV show Community and The Hangover films, Jeong lends his voice to Blue Falcon's robotic sidekick dog.
Tracy Morgan as Captain Caveman: The emblematic Hanna-Barbera humanoid is played by the stand-up comedian and 30 Rock actor.
Billy West as Muttley: The voice actor behind Philip J. Fry and Dr. Zoidberg in Futurama portrays Dastardly's mischevious dog.
Other Cast in Scoob!
Christina Hendricks as Officer Jaffe: Hendrick's most recent roles include Gabby Gabby in Toy Story 4 and Cherie in Solar Opposites, but she's best-known as Joan Holloway in Mad Men.
Fred Tatasciore as Cerberus: The three-headed ghost dog from the underworld. The veteran voice actors credits include Family Guy and Robot Chicken.
Simon Cowell as Himself: The creator and judge of talent shows such as The X-Factor and American Idol. He causes the gang to doubt about the involvement of Shaggy.
John DiMaggio as Restaurant Owner: The long-time voice actor, whose past credits include Bender in Futurama, voices numerous minor characters in Scoob!