Emile Hirsch as Speed Racer.
John Goodman as Pops Racer, Speed's father.
Susan Sarandon as Mom Racer, Speed's mother.
Christina Ricci as Trixie, Speed's girlfriend.
Scott Porter as Rex Racer, Speed's older brother.
Matthew Fox as Racer X, Speed's rival
Nayo Wallace as Minx, Racer X's girlfriend.
Hiroyuki Sanada as Mr. Musha, a businessman.
Rain as Taejo Togokhan,a rookie racer.
Yu Nan as the sister of Taejo Togokhan.
Richard Roundtree as Ben Burns, a commentator who was formerly a racer
Benno Fürmann as Inspector Detector.
Roger Allam as Royalton, the corrupt owner of Royalton Industries.
Kick Gurry as Sparky, Speed's mechanic.
Paulie Litt as Spritle, Speed's younger brother.
Melvil Poupaud as a race commentator.
Christian Oliver in an unnamed role.
Milka Duno as Gearbox.
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