 | Jennifer Garner als Jenna Rink |
 | Mark Ruffalo als Matt "Matty" Flamhaff |
 | Judy Greer als Lucy "Tom-Tom" Wyman |
 | Andy Serkis als Richard Kneeland |
 | Christa B. Allen als Young Jenna |
 | Sean Marquette als Young Matt |
 | Alexandra Kyle als Young Lucy |
 | Kathy Baker als Beverly Rink |
 | Phil Reeves als Wayne Rink |
 | Lynn Collins als Wendy |
 | Sam Ball als Alex Carlson |
 | Susan Egan als Tracy Hansen |
 | Marcia DeBonis als Arlene |
 | Kiersten Warren als Trish Sackett |
 | Scout Taylor-Compton als Tiffany |
 | Jim Gaffigan als Chris Grandy |
 | Alex Black als Young Chris |
 | Ashley Benson als Six Chick |
 | Brie Larson als Six Chick |
 | Brittany Curran als Six Chick |
 | Renee Olstead als Becky |
 | Kayla Hickson als Mindy |
| Nick Olig als Himself |
| Steven Strozza als Himself |
 | Maz Jobrani als Glenn |
 | Joe Grifasi als Mr. Flamhaff |
 | Mary Pat Gleason als Mrs. Flamhaff |
| Megan Lusk als Six Chick |
 | Julia Roth als Six Chick |
| Sarah Loew als Carla |
 | Philip Pavel als Phil |
 | Robinne Lee als Rachel |
 | Benita Krista Nall als Waitress at Party |
 | Catherine Combs als Catherine |
 | Gia Mantegna als Gina |
 | Sydni Beaudoin als Sydni |
| George Hine als Grandy's Friend |
| Irena Violette als Partygoer |
 | Ian Barford als Pete Hansen |
 | Sara Swain als Sara |
 | Corena Chase als Poise Employee |
 | Crystal Michelle als Poise Secretary |
 | Nadine Ellis als Dancer |
 | Adrian Armas als Dancer |
 | Carmit Bachar als Dancer |
 | Tyce Diorio als Dancer |
| Stacey Harper als Dancer |
 | Brandon Henschel als Dance |
| Kadee Sweeney als Dancer |
 | Kimberly Wyatt als Dancer |
| Nancy O'Meara als Dancer |
| Tara Battani als Poise Party Guest (uncredited) |
| Nicole Abisinio als Wardrobe Designer (uncredited) |
| Gary Winick | Director |
| Josh Goldsmith | Screenplay |
| Cathy Yuspa | Screenplay |
| Don Burgess | Director of Photography |
| Susan Littenberg | Editor |
| Susan Arnold | Producer |
| Todd Garner | Executive Producer |
| Dan Kolsrud | Executive Producer |
| Gina Matthews | Producer |
| Donna Roth | Producer |
| Ellen Lewis | Casting |
| Patrick B. O'Brien | Camera Operator |
| John Houlihan | Music Supervisor |
| Theodore Shapiro | Original Music Composer |
| Terri Taylor | Casting |
| Garreth Stover | Production Design |
| Susie DeSanto | Costume Design |
| Leslie E. Rollins | Set Decoration |
| Chris Cornwell | Art Direction |
| Lauren Buckley | Art Department Coordinator |
| Al Lewis | Art Department Coordinator |
| Gintar Repecka | Special Effects Coordinator |
| Steven Kirshoff | Special Effects Coordinator |
| Kosta Saric | Visual Effects Editor |
| Jamie Stevenson | Visual Effects Producer |
| Jeff Werner | Visual Effects Producer |
| David Jones | Visual Effects Supervisor |
| Jennifer Euston | Casting Associate |
| Marisa Aboitiz | Costume Supervisor |
| Marta Font | Set Costumer |
| Barrett Hong | Set Costumer |
| Ángela Núñez | Set Costumer |
| Daniel Pinder | Music Editor |
| Sharron Reynolds-Enriquez | Script Supervisor |
| Frances Mathias | Hair Department Head |
| Michael Reitz | Hairstylist |
| Angel De Angelis | Key Hair Stylist |
| Katherine Rees | Key Hair Stylist |
| Cindy J. Williams | Makeup Department Head |
| Deborah La Mia Denaver | Makeup Artist |
| Amy Schmiederer | Makeup Artist |
| Tracy Bennett | Still Photographer |
| Barry Wetcher | Still Photographer |
| Zoran Veselic | First Assistant Camera |
| Don Steinberg | First Assistant Camera |
| Hugh Waddell | Dialogue Editor |
| Emily Ferry | Property Master |
| Peter Gelfman | Property Master |
| Greg Steele | ADR Mixer |
| Bob Beher | Foley Supervisor |
| Tom Bellfort | Supervising Sound Editor |
| Hector C. Gika | Sound Effects Editor |
| Harry Cohen | Sound Designer |
| James J. Sabat Jr. | Sound Recordist |
| James Sabat | Sound Mixer |
| Geoffrey G. Rubay | Sound Effects Editor |
| Perry Robertson | Sound Effects Editor |
| Brad Sherman | Sound Re-Recording Mixer |
| Jon Taylor | Sound Re-Recording Mixer |
| Sean Landeros | Sound Recordist |
| Nerses Gezalyan | Sound Mixer |
| Nerses Gezalyan | Foley Recordist |
| David MacMillan | Sound Mixer |
| Jeffrey Wilhoit | Foley Artist |
| Joseph M. Odrejko | Construction Coordinator |
| Joseph S. Alfieri | Construction Coordinator |
| Shauna Duggins | Stunt Double |
| Shauna Duggins | Stunt Coordinator |
| John Cenatiempo | Stunts |
| Bill Anagnos | Stunts |
| Norman Douglass | Stunts |
| Kevin Abercrombie | Utility Stunts |
| Danny Aiello III | Stunts |
| Cort Hessler | Stunt Driver |
| Hudson Cooper | Stunts |
| Pat Romano | Stunt Coordinator |
| Marguerite Pomerhn Derricks | Choreographer |
| Allegra Clegg | Co-Producer |
| Charles Newirth | Executive In Charge Of Production |
| Murphy Occhino | Second Assistant Director |
| Eric Fox Hays | First Assistant Director |
| Hope Garrison | Second Assistant Director |
