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)

Brian Williams

Rock Granite (voice)

Michael Hall D'Addario

Leo (voice)

Danny Tamberelli

Snowball Fight Kid / Older Brother / Policeman (voice)

Veronica Taylor

Younger Brother / Girl on Santa's Lap (voice)

Ramsey Faragallah

Hot Dog Vendor (voice)

Sharon Wilkins

African American Mom / African American Girl (voice)