Speed
Young Speed Racer
Mom
Speed's Teacher
Young Trixie
Rex Racer
Everyman Announcer (as Gian Ganziano)
Local Announcer
Harold Ledermann Announcer
Japanese Announcer
Russian Announcer
Italian Announcer
French Announcer
Celtic Announcer
Sparky
Snake Oiler
Pops
Crew Chief / Sempre Fi-Ber Driver
Blackjack Benelli
Spritle Racer
Chim Chim
Trixie
Blonde Pack Leader
Race Announcer
Race Commentator
Big Mouth
Press Man
Racer X
Minx (as Nayo K. Wallace)
Royalton
Flight Attendant
Gennie
Cannonball Taylor
Taejo Togokahn
Vinny - Cruncher Thug
Cruncher Block
Cruncher Thug
Truck Driver
Mr. Musha
Marvin the Cleaning Man
Joel Goldman (as Ecki Hoffmann)
Security Goon
Fuji Announcer (as Art La Fleur)
Fuji Announcer
Horuko Togokahn
Grey Ghost
Dour Face
Ben Burns
Inspector Detector
Casa Cristo Announcer
Johnny 'Goodboy' Jones
Queen of Casa Cristo (as Kadý Taylor)
Shark Driver
Delila
Flying Fox (as Dari Maximova)
Sempre Fi-Ber Leader
Thor-azine Leader (as Komi Togbonou)
Hydro-cell Driver
C.I.B. Security Man
Taejo Body Guard
Mr. Togokahn
Fuji Reporter
Cass Jones
Security Official
Senior Race Official
Grand Prix Female Announcer
Nitro
Yakuza Driver
Denise
Gearbox / Kellie Kalinkov
Count Down Tower Woman
Prince Kabala
German Announcer
Turkish Announcer
Korean Announcer
Spanish Announcer (as Oscar Ortega Sanchez)
Chinese Announcer
Persian Announcer
Grand Prix Announcer
Sleazy Telephone Salesman (voice) (as William R. Dean)
Speed Racer (voice) (uncredited)
Big Mouth (uncredited)
Prince Fan (uncredited)
Pitter Pat (uncredited)
Grand Prix Heroine (uncredited)
Racing Fan (uncredited)
Security (uncredited)
Japanese (uncredited)
Reporter - Grand Prix (uncredited)