 | Billy Bob Thornton als Jasper Woodcock |
 | Seann William Scott als John Farley |
 | Susan Sarandon als Beverly Farley |
 | Amy Poehler als Maggie |
 | Ethan Suplee als Nedderman |
 | Melissa Sagemiller als Tracy |
 | Melissa Leo als Sally Jansen |
 | Jacob Davich als Nedderman's Brother |
 | Tyra Banks als Self |
 | Jack Walsh als Palumbo |
 | Alec George als Young Nedderman |
 | Allisyn Ashley Arm als Scout Girl |
 | M.C. Gainey als Hal - Barber #1 |
 | Brent Briscoe als Barber #2 |
 | Jennifer Aspen als Cindy the Realtor |
 | Brad Beyer als Jay Elms - Dumb Jock |
 | Joshua Feinman als Marine |
 | Carissa Kosta als Farley Stalker |
 | Googy Gress als Earnest Man |
 | Emily Wagner als Cheery Woman |
 | Lyle Kanouse als Carnie #1 |
 | Stephen Monroe Taylor als Oates |
 | Michael Santorico als Waiter at Barone's |
 | Kurt Fuller als Councilman Luke |
 | Lisa K. Wyatt als Housewife |
 | Van Epperson als Carnie #2 |
 | Scott Adsit als Cheesy Salesman |
| Max Van Ville als Pizza Waiter |
 | Alisha Gaddis als Parade Goer (uncredited) |
| Dave Kuhr als Bookish Guy |
| Craig Gillespie | Director |
| Michael Carnes | Writer |
| Kent Alterman | Executive Producer |
| Bob Cooper | Producer |
| David Dobkin | Producer |
| Toby Emmerich | Executive Producer |
| Keith Goldberg | Co-Executive Producer |
| Diana Pokorny | Executive Producer |
| Michele Weiss | Co-Executive Producer |
| Theodore Shapiro | Music |
| Tami Reiker | Director of Photography |
| Alan Baumgarten | Editor |
| Kevin Tent | Editor |
| Mary Vernieu | Casting |
| Alison Sadler | Production Design |
| Wendy Chuck | Costume Design |
| Gary Jensen | Stunt Coordinator |
| Steve M. Davison | Stunt Coordinator |
| Chris Carnel | Stunt Double |
| Justin Sundquist | Stunt Double |
| Jan Foster | Unit Production Manager |
| Jonathan McGarry | First Assistant Director |
| Bac DeLorme | Second Assistant Director |
| Erik Holmberg | Executive In Charge Of Production |
| Katherine E. Beyda | Production Executive |
| Paul Prokop | Executive in Charge of Finance |
| Jody Levin | Executive In Charge Of Post Production |
| Rick Reynolds | Post Production Supervisor |
| James F. Truesdale | Art Direction |
| Gaston Langer | Assistant Art Director |
| Michael A. Truesdale | Art Department Coordinator |
| John Berger | Set Designer |
| Greg Berry | Set Designer |
| Anthony D. Parrillo | Set Designer |
| Mark Vena | Storyboard Artist |
| Warren Drummond | Storyboard Artist |
| Steven Samanen | Graphic Designer |
| Jay Hart | Set Decoration |
| Wayne Shepherd | Leadman |
| Paul Sanchez | "A" Camera Operator |
| Mark Figueroa | First Assistant "A" Camera |
| Chris Cuevas | Second Assistant "A" Camera |
| Henry Tirl | "B" Camera Operator |
| Henry Tirl | Steadicam Operator |
| Heather Lea | First Assistant "B" Camera |
| Jesse Roth | Second Assistant "B" Camera |
| Robyn Link | Camera Loader |
| Tracy Bennett | Still Photographer |
| Steve Cantamessa | Sound Mixer |
| Gary Thomas | Boom Operator |
| Scott La Rue | Boom Operator |
| Chris Shadley | Video Assist Operator |
| Matthew Morrissey | 24 Frame Playback |
| Diana Adams | Production Accountant |
| Jill Hahn | Payroll Accountant |
| Matthew Spiegel | Production Coordinator |
| Karen Golden | Script Supervisor |
| Paul Schmitz | Second Second Assistant Director |
| Jeffrey W. Petersen | Chief Lighting Technician |
| Pat Fitzpatrick | Assistant Chief Lighting Technician |
| Kevin J. Lang | Rigging Gaffer |
| Herb Ault | Key Grip |
| Dustin Ault | Best Boy Grip |
| Daniel Jiménez | Dolly Grip |
| Gary Tuers | Property Master |
| Mark P. Stoeckinger | Supervising Sound Editor |
| Victor Ray Ennis | Supervising Sound Editor |
| Patrick Cyccone Jr. | Sound Re-Recording Mixer |
| Daniel J. Leahy | Sound Re-Recording Mixer |
| Daniel S. Irwin | Dialogue Editor |
| Stephanie Flack | Dialogue Editor |
| Ron Bedrosian | ADR Mixer |
| Julio Carmona | ADR Recordist |
| Nerses Gezalyan | Foley Mixer |
| Jeffrey Wilhoit | Foley Artist |
| James Moriana | Foley Artist |
| Chris Snyder | Construction Coordinator |
| Patricia Androff | Key Makeup Artist |
| Amy Lederman | Makeup Artist |
| Josh Gilbert | Writer |
