Cast principale
Danny DeVito
Cab Driver / Narrator (voice)
Lucy Liu
Leo's Mother (voice)
Freddy Rodríguez
Leo's Father (voice)
Brenda Song
Big Sister (voice)
Fred Newman
Little Spirit / Ramona / Squirrel / Pigeon (voice)
Rachel Schier
Dylan (voice)
Brian Williams
Rock Granite (voice)
Michael Hall D'Addario
Leo (voice)