 | Seth Green als The Nerd / Santa Claus / Rudolph / Hermey the Elf (voice) |
 | Jim Hanks als Polar Express Conductor (voice) |
 | Scott Porter als Chris Evans (voice) |
 | Michaela Watkins als Nerd's Mom (voice) |
 | Henry Winkler als Nerd's Dad (voice) |
 | James Wolk als Del Griffith / Fred Claus (voice) |
 | Matthew Senreich als North Pole Valet / Elf (voice) |
| Doug Goldstein | Writer |
| Tom Root | Writer |
| Mike Fasolo | Writer |
| Shelby Fero | Writer |
| Seth Green | Writer |
| Joel Hurwitz | Writer |
| Matthew Senreich | Writer |
| Tom Sheppard | Writer |
| Tom Sheppard | Director |