 Will FerrellHarold Crick | Harold Crick |
 Maggie GyllenhaalAna Pascal | Ana Pascal |
 Dustin HoffmanProfessor Jules Hilbert | Professor Jules Hilbert |
 Emma ThompsonKaren Eiffel | Karen Eiffel |
 Queen LatifahPenny Escher | Penny Escher |
 Tony HaleDave | Dave |
 Tom HulceDr. Cayly | Dr. Cayly |
 Linda HuntDr. Mittag-Leffler | Dr. Mittag-Leffler |
 Kristin ChenowethBook Channel Host | Book Channel Host |
 John M. Watson Sr.TV Author | TV Author |
| WWilliam DickIRS Co-Worker #1 | IRS Co-Worker #1 |
 Guy MasseyIRS Co-Worker #2 | IRS Co-Worker #2 |
| MMartha EspinozaIRS Co-Worker #3 | IRS Co-Worker #3 |
 T.J. JagodowskiIRS Co-Worker #4 | IRS Co-Worker #4 |
 Peter GroszIRS Co-Worker #5 | IRS Co-Worker #5 |
 Tonray HoIRS Co-Worker #6 | IRS Co-Worker #6 |
| HHerb LichtensteinIRS Co-Worker #7 | IRS Co-Worker #7 |
| SStacey Elaine JacksonIRS Co-Worker #8 | IRS Co-Worker #8 |
| RRicky AdamsYoung Boy | Young Boy |
 Christian StolteYoung Boy's Father | Young Boy's Father |
 Denise HughesKronecker Bus Driver | Kronecker Bus Driver |
 Peggy RoederPolish Woman | Polish Woman |
 Danny RhodesBakery Employee #1 | Bakery Employee #1 |
 Linara WashingtonBakery Employee #2 | Bakery Employee #2 |
 Helen YoungBakery Customer #1 | Bakery Customer #1 |
| DDavid PompeiiBakery Customer #2 | Bakery Customer #2 |
| DDavid WiegersBakery Customer #3 | Bakery Customer #3 |
 Jarrett SleeperBakery Customer #4 | Bakery Customer #4 |
 Larry Neumann Jr.Homeless Man | Homeless Man |
 John MohrleinMan with Hose | Man with Hose |
