| Lindsay Lohan | Cady Heron |
| Rachel McAdams | Regina George |
| Tina Fey | Ms. Norbury |
| Tim Meadows | Mr. Duvall |
| Amy Poehler | Mrs. George |
| Ana Gasteyer | Mrs. Heron |
| Lacey Chabert | Gretchen Wieners |
| Amanda Seyfried | Karen Smith |
| Lizzy Caplan | Janis Ian |
| Daniel Franzese | Damian |
| Director | Mark Waters |
| Producer | Jennifer Guinier; Jill Sobel Messick |
| Writer | Rosalind Wiseman; Tina Fey |
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