O Início do Mundo de Greg: Um Filme Original

Philip Solomon

Craig / Warpspeed (voice)

Noël Wells

Kelsey / Bug Battler / Mortimor / Serena's Friend (voice)

H. Michael Croner

JP / Kraken Kid / Bryan / Todd / Flag Kid / Serena's Friend (voice)

Vico Ortiz

Serena (voice)

Kimberly Hébert Gregory

Nicole (voice)

Byron Marc Newsome

Duane (voice)

Lucia Cunningham

Jessica (voice)

Phil LaMarr

Bernard / Teach / Waterballoon Mike (voice)

Jeff Trammell

James / Gibson / Cannonball (voice)

Jolie Hoang-Rappaport

Hannah (voice)

Zehra Fazal

Gala / Shannon the Scout / Tattoo (voice)

Ben Levin

Bobby / Man on Bike / Tony / Jameolas (voice)

Matt Burnett

Frog Master / Pokey / Roger / Monkey Kid (voice)

Jessica McKenna

Handlebarb (voice)

Gunnar Sizemore

Jason / Kah / Boom (voice)

Andree Vermeulen

Eliza / Andy (voice)

Dana Davis

Kit (voice)

Najja Porter

Kristenandra / Nessie / Cammy (voice)

Analesa Fisher

The Timekeeper (voice)

Terrence Hardy Jr.

Harry / Norman / Ankles (voice)

Ashleigh Crystal Hairston

Renee / Wren (voice)

Karen Fukuhara

Alexis (voice)