| Person | Type | Job | Role(s) |
|---|---|---|---|
 Leopoldo Gout | Crew | Directing | Director |
 Susan Holden | Crew | Directing | Director |
Andy Rheingold | Crew | Writing | Writer |
 Brenda Song | Cast | Actress | Big Sister (voice) |
 Danny DeVito | Cast | Actor | Cab Driver / Narrator (voice) |
 Danny Tamberelli | Cast | Actor | Snowball Fight Kid / Older Brother / Policeman (voice) |
 Fred Newman | Cast | Actor | Little Spirit / Ramona / Squirrel / Pigeon (voice) |
 Freddy Rodríguez | Cast | Actor | Leo's Father (voice) |
 Lucy Liu | Cast | Actress | Leo's Mother (voice) |
 Ramsey Faragallah | Cast | Actor | Hot Dog Vendor (voice) |
 Veronica Taylor | Cast | Actress | Younger Brother / Girl on Santa's Lap (voice) |
 Brian Williams | Cast | Actor | Rock Granite (voice) |
 Sharon Wilkins | Cast | Actress | African American Mom / African American Girl (voice) |
Todd Cummings | Cast | Narrator - Dead Fish (voice) | |
 Michael Hall D'Addario | Cast | Actor | Leo (voice) |
 Shawn Andrew | Cast | Actor | Security Guard (voice) (as Shawn T. Andrew) |
Sally Winters | Cast | Girls' Mom / Knitting Lady (voice) | |
Les Mau | Cast | Actor | Chinese Man (voice) |
Rachel Schier | Cast | Dylan (voice) | |
| Person | Type | Job | Role(s) |
