Freddie Highmore
Mia Farrow
Penny Balfour
Doug Rand
Adam LeFevre
Jean Bejote Njamba
Serge Blumental
Madonna
Jimmy Fallon
Robert De Niro
Freddie Highmore as Arthur
Mia Farrow as Granny
Penny Balfour as Arthur's Mother
Doug Rand as Arthur's Father
Adam LeFevre as Davido
Jean Bejote Njamba as Massai Chief
Serge Blumental as Electrician
Madonna as Princess Selenia (voice: English version)
Jimmy Fallon as Betameche (voice: English version)
Robert De Niro as King (voice: English version)
Lee de Jong as Hardware girl
Harvey Keitel as Miro (voice: English version)
Chazz Palminteri as The Travel Agent (voice: English version)
Rhoff as Max (voice: French version)
Emilio Estevez as Ferryman (voice: English version)