 | Zach Braff als Michael |
 | Jacinda Barrett als Jenna |
 | Casey Affleck als Chris |
 | Rachel Bilson als Kim |
 | Michael Weston als Izzy |
 | Eric Christian Olsen als Kenny |
 | Marley Shelton als Arianna |
 | Lauren Lee Smith als Lisa |
 | Harold Ramis als Professor Bowler |
 | Blythe Danner als Anna |
 | Tom Wilkinson als Stephen |
 | David Haydn-Jones als Mark |
 | Cindy Sampson als Danielle |
 | Lisa MacKay als Stripper #1 |
 | Patricia Stasiak als Stripper #2 |
 | Mark Walker als Mark's Father |
 | Erika Rosenbaum als Eva |
 | Alexis Legault als Matty |
| Olivier Legault als Matty |
 | Simon Alain als Arianna's Lover |
 | Ian Finlay als Architect Partner |
 | Barry Julien als Young Architect |
 | Alexandra Ruddy als Kim's Friend |
 | Mariah Inger als Secretary |
 | Monique Phillips als Female Patient |
 | Danny Blanco Hall als Bartender |
 | Andrew Shaver als Camper Salesman |
 | Danny Wells als Izzy's Uncle |
 | Goûchy Boy als Michael's Neighbor |
| Gabriele Muccino | Executive Producer |
| Marcus Viscidi | Producer |
| Paul Haggis | Screenplay |
| Tom Rosenberg | Producer |
| Terry McKay | Executive Producer |
| Eric Reid | Executive Producer |
| Gabriele Muccino | Screenplay |
| Andre Lamal | Producer |
| Gary Lucchesi | Producer |
| Harley Tannenbaum | Executive Producer |
| Tony Goldwyn | Director |
| Lisa Zeno Churgin | Editor |
| Michael Penn | Music |
| Dan Leigh | Production Design |
| Tom Stern | Director of Photography |
| Deborah Aquila | Casting |
| Odette Gadoury | Costume Design |
| Tricia Wood | Casting |
| Rick Cranford | Script Coordinator |
| Jennifer L. Smith | Casting |
| Kurt Smith | Color Timer |
| Manon Bougie | Unit Production Manager |
| Pedro Gandol | First Assistant Director |
| Roxanna Macedo | Second Assistant Director |
| Guendalina Ponti | Co-Producer |
| Brian McNelis | Music Supervisor |
| Marc Désourdy | Stunt Coordinator |
| Ben Gauthier | Stunts |
| Karine Lemieux | Stunts |
| Gilles Aird | Art Direction |
| Doris Simard | Art Department Coordinator |
| France Lachapelle | Script Supervisor |
| Stephen S. Campanelli | Camera Operator |
| Stephen S. Campanelli | Steadicam Operator |
| Claude Leclair | Set Decoration |
| Frédérique Bolté | Set Decoration |
| Vincent Aird | Set Dresser |
| Nicolas Marion | Focus Puller |
| Eric Aubin | Camera Loader |
| Diana Tauder | Post Production Supervisor |
| Gena Bleier | First Assistant Editor |
| Stephanie Girard Hamelin | Video Assist Operator |
| Jonathan Wenk | Still Photographer |
| Patrick Rousseau | Sound Recordist |
| Maxime Ferland | Boom Operator |
| Jean-Philippe Bérubé | Cableman |
| Lise Pharand | Property Master |
| John-Michael Bellamy | Graphic Designer |
| Réal Hamel | Picture Car Coordinator |
| John Lewin | Gaffer |
| Jeff Scott | Best Boy Electric |
| Michel Périard | Key Grip |
| Pierre Charpentier | Dolly Grip |
| Joost Clerinx | Grip |
| Alain Bisson Doyal | Grip |
| Jean-Yves Denis | Grip |
| Réjean Goderre | Key Hair Stylist |
| Dominique Dupras | Hairstylist |
| Micheline Trépanier | Key Makeup Artist |
| Christophe Giraud | Makeup Artist |
| Julie Mignot | Assistant Makeup Artist |
| Rosalie Clermont-Bilodeau | Wardrobe Coordinator |
| Diane Daoust | Assistant Costume Designer |
| Suzanne Gaudreault | Seamstress |
| David Giammarco | Supervising Sound Editor |
| Kim Drummond | Dialogue Editor |
| Wayne Griffin | Dialogue Editor |
| Jonathan Klein | Sound Effects Editor |
| Scott A. Jennings | Sound Effects Editor |
| D. Chris Smith | Sound Effects Editor |
| Lise Richardson | Music Editor |
| Joe Schiff | First Assistant Sound Editor |
| Rupert Nadeau | Assistant Sound Editor |
| Galen Goodpaster | Assistant Sound Editor |
| Thomas J. O'Connell | ADR Mixer |
| Rick Canelli | ADR Recordist |
| David Giammarco | Sound Re-Recording Mixer |
| Gregory H. Watkins | Sound Re-Recording Mixer |
| Eric Flickinger | Sound Recordist |
| Chad Algarin | Sound Recordist |
| Maureen Murphy | Foley Artist |
| Elaine Stef | Assistant Foley Artist |
| Gordon Sproule | Foley Recordist |
| Teresa Alvis | Post Production Accountant |
| Grant Grabowski | Production Coordinator |
| Benoît Mathieu | Location Manager |
| Carl Kouri | Third Assistant Director |
| John Gaskin | Production Accountant |
| Daniel Ross | Transportation Coordinator |
| Linda Rona | Extras Casting |
| Jennifer Ricchiazzi | Casting Assistant |
| Anthony 'Max' Ivins | Visual Effects Supervisor |
