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