Freddie Highmore

Arthur Montgomery

Mia Farrow

Granny

Logan Miller

Jake

Robert Stanton

Armand

Penny Balfour

Rose Montgomery

Ron Crawford

Archibald

Jean Bejote Njamba

Chief Matassalai (voice)

Lou Reed

Maltazard (voice)

Selena Gomez

Selenia (voice)

Jimmy Fallon

Prince Betameche (voice)