| Person | Type | Job | Role(s) |
|---|---|---|---|
 Barbara A. Hall | Crew | Production | Executive Producer |
Bryan Felty | Crew | Art | Art Direction |
 George Clooney | Crew | Directing | Director, Producer |
 Grant Heslov | Crew | Production | Producer |
Jenny Eagan | Crew | Costume & Make-Up | Costume Design |
Jon Title | Crew | Sound | Sound Designer |
Julian Slater | Crew | Sound | Supervising Sound Editor |
Kalina Ivanov | Crew | Art | Production Design |
Linda Cohen | Crew | Sound | Music Supervisor |
Martin Ruhe | Crew | Camera | Director of Photography |
Matt Kasmir | Crew | Visual Effects | Visual Effects Supervisor |
Melissa M. Levander | Crew | Art | Set Decoration |
Nancy Nugent | Crew | Sound | Supervising Sound Editor |
 Rachel Tenner | Crew | Production | Casting |
 Ted Hope | Crew | Production | Producer |
Todd Beckett | Crew | Sound | Sound Re-Recording Mixer |
Trish Seeney | Crew | Costume & Make-Up | Makeup Department Head |
 William Monahan | Crew | Writing | Screenplay |
Dana Pacheco | Crew | Costume & Make-Up | Costume Supervisor |
Tanya Swerling | Crew | Editing | Editor |
J.R. Moehringer | Crew | Production | Executive Producer, Book |
Dara Taylor | Crew | Sound | Original Music Composer |
 Halle Curley | Crew | Crew | Production Office Assistant |
 Ben Affleck | Cast | Actor | Charlie Maguire |
 Christopher Lloyd | Cast | Actor | Grandpa Maguire |
Jenny Eagan | Cast | Actress | Chief's Wife |
 Max Casella | Cast | Actor | Chief |
 Max Martini | Cast | Actor | The Voice, JR's father |
 Ron Livingston | Cast | Actor | Future JR Maguire (voice only) |
 Sondra James | Cast | Actress | Grandma Maguire |
 Lily Rabe | Cast | Actress | Dorothy Maguire |
 Mark Boyett | Cast | Actor | Sidney's Dad |
 Quincy Tyler Bernstine | Cast | Actress | Sidney's Mom |
 Shannon Collis | Cast | Actress | Pat |
 Kate Middleton | Cast | Actress | NYT Personnel Woman |
 Michael Braun | Cast | Actor | Bobo |
 Steve Gagliastro | Cast | Actor | Other Customer |
 Tye Sheridan | Cast | Actor | JR Maguire |
 Rhenzy Feliz | Cast | Actor | Wesley |
Michael Steven Costello | Cast | Actor | NYT Editor |
 Ezra Knight | Cast | Actor | Professor Van Dyke |
 Jackson Damon | Cast | NYT Copyboy | |
 Ivan Leung | Cast | Actor | Jimmy |
Matthew Delamater | Cast | Actor | Joey D |
 Alissa Bourne | Cast | Actress | Dickens Bar Patron (uncredited) |
 Caroline Bergwall | Cast | NYT Copygirl | |
 Daniel Washington | Cast | Actor | Officer James |
 Meara Mahoney Gross | Cast | Actress | Aunt Ruth's Kid #3 |
 Kate Avallone | Cast | Actress | Kathy |
 Daniel Ranieri | Cast | Young JR Maguire | |
 Briana Middleton | Cast | Actress | Sidney |
 David Carl | Cast | Actor | School Psychologist |
Jennifer C. Johnson | Cast | Actress | Mrs. Williams |
 Annabella Valle | Cast | Actress | Aunt Ruth's Kid #1 |
Keira Jo Lassor | Cast | Kathy's Daughter | |
Clara Kelly | Cast | Actress | Aunt Ruth's Kid #2 |
Danielle Ranieri | Cast | Actress | Aunt Ruth |
Alex Barber | Cast | Actor | Kid in Classroom (uncredited) |
Jack Baumrind | Cast | Kid in Classroom (uncredited) | |
Julia Bechler | Cast | Dickens Bar Regular (uncredited) | |
Keith R Beck | Cast | Yale Student (uncredited) | |
| Person | Type | Job | Role(s) |
