| Will Ferrell | Harold Crick |
| William Dick | IRS Co-Worker #1 |
| Guy Massey | IRS Co-Worker #2 |
| Martha Espinoza | IRS Co-Worker #3 |
| T.J. Jagodowski | IRS Co-Worker #4 |
| Peter Grosz | IRS Co-Worker #5 |
| Ricky Adams | Young Boy |
| Christian Stolte | Young Boy's Father |
| Denise Hughes | Kronecker Bus Driver |
| Peggy Roeder | Polish Woman |
| Director | Marc Forster |
| Producer | Lindsay Doran; Joseph Drake |
| Writer | Zach Helm |
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