Trailer
 | Katie Holmes as Katie Burke |
 | Benjamin Bratt as Wade Handler |
 | Charlie Hunnam as Embry Larkin |
 | Zooey Deschanel as Samantha Harper |
 | Fred Ward as Bill Stayton |
 | Mark Feuerstein as Robert Hanson |
 | Melanie Lynskey as Mousy Julie |
 | Philip Bosco as Professor Jergensen |
 | Gabriel Mann as Harrison Hobart |
 | Will McCormack as August |
 | Gabrielle Union as Amanda Luttrell |
 | Greg Kramer as Andre |
 | Gillian Ferrabee as Susan |
 | Barry Julien as Ted |
 | Tony Goldwyn as David Schaffer |
 | Scott Faulconbridge as Jed |
 | Vanessa Petch as Young Katie |
| Victoria Petch as Young Katie |
| Kevin Ryder as Regular Guy |
 | Rachelle Lefevre as Eager Beaver |
| Paul Lemelin as Eager Beaver |
 | Simon Peacock as Tech Recruiter |
 | Howard Bilerman as Venture Capitalist |
 | Mark Camacho as Detective Rigney |
 | Mike Tsar as Detective Kanter |
| Rob Burns as Archivist |
 | Kim Lambert as Female Interviewee |
| Alicia Westelman as Girl Singer |
 | Jodie Resther as Girl Singer |
| Bonnie Mak as Waitress |
 | Joe Cobden as Student on Cell Phone |
 | Kwasi Songui as Campus Security Officer |
| Jay Lavalley as Campus Security Officer |
 | Arthur Holden as Frank Peabody |
 | Brett Watson as Recovering Alcoholic College Student |
 | Noel Burton as Bill |
 | Bill Rowat as Harrison Hobart, Sr. |
| Liz MacRae as Mrs. Harrison Hobart |
| Richard McConomy as Cabbie |
| Bill Corday as Homeless Guy |
 | Gianpaolo Venuta as Research Assistant |
 | Sheena Larkin as Female Mogul |
 | Ivan Smith as Professor |
 | Mike Paterson as Russian Bear |
 | Samir Mallal as Indian Guy |
 | David Gow as Passerby Outside Plum |
| Tim Petch as Katie's Father |
| Ryan Wilner as Student in Cafeteria |
| Charles S. Doucet as Recovering Alcoholic Member |
 | Charles Papasoff as Recovering Alcoholic Member |
 | Andrea Sadler as Recovering Alcoholic Member |
 | Christian Paul as Recovering Alcoholic Member |
 | Shawn Baichoo as Trip Hop Inferno: Virgil |
 | Ryan Kennedy as Trip Hop Inferno: Tortured Soul |
 | Philip LeMaistre as Trip Hop Inferno: Tortured Soul |
 | Giancarlo Caltabiano as Trip Hop Inferno: Dante |
| Joseph Baugniet as Trip Hop Inferno: Performer |
 | John Fallon as Trip Hop Inferno: Mime |
| Daniel Lee as Trip Hop Inferno: Wolf |
| Malcolm Travis as Trip Hop Inferno: Minos |
| Bryanne Hastings as Trip Hop Inferno: Performer |
 | Joan McBride as Library Assistant |
| Aaron Baril as Student Choir |
| David Benson as Student Choir |
| Chris Burrage as Student Choir |
 | Jonathan Davis as Student Choir |
| Jon Day as Student Choir |
| Benjamin Kwong as Student Choir |
| Kris Epps as Student Choir |
| Owen Meyers as Student Choir |
| Nathaniel Misri as Student Choir |
| Dantonio Pisano as Student Choir |
| David Podgorski as Student Choir |
| Mark Barter as Student Choir |
| Mark Biunno as Student Choir |
| Padraig Buttner-Schnirer as Student Choir |
| Chris Forbes as Student Choir |
| Fred Issid as Student Choir |
| Andrew Mangal as Student Choir |
| Nick Roy as Student Choir |
| Jonathan Stewart as Student Choir |
| Si-Wai Francis Zih as Student Choir |
| Ahad Sianati as Student Choir |
| Raffael Cavaliere as Student Choir |
| Marika Anthony-Shaw as Student Choir |
| Annesley Black as Student Choir |
| Marie Claude Harvey as Student Choir |
| Amelia McMahon as Student Choir |
| Tobie Miller as Student Choir |
 | Anne-Lise Nadeau as Student Choir |
| Julie Paquet as Student Choir |
| Martine Poirier as Student Choir |
| Fanny Quenneville as Student Choir |
| Sahra Ucar as Student Choir |
| Shannon Simpson as Student Choir |
| Wing-Chan "Emily" Chung as Student Choir |
| Marie-Noel Daignault as Student Choir |
| Nancy Duncan as Student Choir |
| Doherty Caitlin as Student Choir |
| Talya Grumberg as Student Choir |
| Rachel Moody as Student Choir |
| Jessica Muirhead as Student Choir |
| Bohdanna Novak as Student Choir |
| Gael O'Shaughnessy as Student Choir |
| Iwan Edwards as Choir Conductor |
| Shannon Cohen as Pirates of Penzance |
| Zosia Bornik as Pirates of Penzance |
 | Michele Tredger as Pirates of Penzance |
| Erica Danya Goldblatt as Pirates of Penzance |
 | Daniel Murphy as Pirates of Penzance |
 | Chad Connell as Pirates of Penzance |
| Christopher Dyson as Pirates of Penzance |
| Eric Biunno as Pirates of Penzance |
| Andrea Shuster as Pirates of Penzance |
 | Edward Lafferty as Pirates of Penzance |
| Sherry O'Connell as Pirates of Penzance |
| Nathalie Beaudoin as Pirates of Penzance |
| Emily Lamarche as Pirates of Penzance |
| Andrew Burr as Pirates of Penzance |
 | Mark Hauser as Pirates of Penzance |
 | Jeffrey Wetsch as Pirates of Penzance |
| Sacha Medine as Pirates of Penzance |
| Eli Udell as Pirates of Penzance |
| John Gilbert as Pirates of Penzance |
 | Bombyx Du Murier as Pirates of Penzance |
 | Marc Gourdeau as Client De La Tabagie |
| Eric Benton as Ski Mask Guy (uncredited) |
 | Claudia Besso as Susan Bunwell (uncredited) |
 | Josh Kimmel as Grieving Student (uncredited) |
| Camille Wainwright as Ellie Watson (uncredited) |
 | Elizabeth Whitmere as Mrs. Burke (uncredited) |
| Directing | |
| Stephen Gaghan | Director |
Writing | |
| Stephen Gaghan | Writer |
Production | |
| Richard Vane | Executive Producer |
Sound | |
| Arvo Pärt | Additional Soundtrack |
Production | |
| Gary Barber | Producer |
| Roger Birnbaum | Producer |
| Lynda Obst | Producer |
| Edward Zwick | Producer |
Editing | |
| Mark Warner | Editor |
Art | |
| Gideon Ponte | Production Design |
Costume & Make-Up | |
| Louise Frogley | Costume Design |
Production | |
| Juel Bestrop | Casting |
| Jeanne McCarthy | Casting |
| Kathleen Chopin | Casting |
| Rosina Bucci | Casting |
Sound | |
| Clint Mansell | Original Music Composer |
Crew | |
| Matthew Libatique | Cinematography |
Costume & Make-Up | |
| Marie-France Cardinal | Hairstylist |
| Julie Chabot | Makeup Artist |
Art | |
| Pierre Perrault | Art Direction |
| Suzanne Cloutier | Set Decoration |
| Anne Galéa | Set Decoration |
| Dominique Gosselin | Set Decoration |
| Daniéle Rouleau | Set Decoration |
Sound | |
| Vic Radulich | Sound |
Production | |
| Shannon Burke | Producer |
| Elizabeth Joan Hooper | Producer |
