Freddie Highmore
Arthur Montgomery
Madonna
Princess Selenia (voice)
Mia Farrow
Daisy Suchot
Adam LeFevre
Davido
Doug Rand
Arthur's Father
Penny Balfour
Rose Montgomery
Ron Crawford
Archibald Suchot
David Bowie
Maltazard (voice)
David Suchet
Narrator (voice)
Robert De Niro
King (voice)
Snoop Dogg
Max (voice)
Jean Bejote Njamba
Chief Matassalai (voice)
Lee Delong
Saleslady
Saul Jephcott
Police Officer #1
