Logan Lerman (Charlie), Emma Watson (Sam), Ezra Miller (Patrick), Mae Whitman (Mary Elizabeth), Kate Walsh (Mother), Dylan McDermott (Father), Melanie Lynskey (Aunt Helen) more..., Nina Dobrev (Candace), Johnny Simmons (Brad), Joan Cusack (Dr. Burton), Paul Rudd (Mr. Anderson), Nicholas Braun (Ponytail Derek), Reece Thompson (Craig), Patrick de Ledebur (Senior Bully), Brian Balzerini (Linebacker), Tom Kruszewski (Nose Tackle), Julia Garner (Susan), Tom Savini (Mr. Callahan), Emily Marie Callaway (Mean Freshman Girl), Chelsea Zhang (Shakespeare Girl), Jesse Scheirer (Freshman Boy), Justine Nicole Schaefer (Twin Girl #1), Julie Marie Schaefer (Twin Girl #2), Leo Miles Farmerie (7-Year-Old Charlie), Isabel Muschweck (9-Year-Old Candace), Adam Hagenbuch (Bob), Erin Wilhelmi (Alice), Jordan Paley (Rocky MC), Zane Holtz (Chris), Timothy Breslin (Policeman), Mark McClain Wilson (Emergency Room Policeman), Atticus Cain (Emergency Room Doctor), Stacy Chbosky (Young Mom), Dihlon McManne (Priest), Laurie Klatscher (School Principal), Landon Pigg (Peter), Jennifer Enskat (Sam's Mom), William L. Thomas (Patrick's Dad), Morgan Wolk (Candace's Friend), Joe Fishel (Parent) and others.

Mary Jo Markey (Editor), Stephen Chbosky (Novel), Stephen Chbosky (Screenplay), John Malkovich (Producer), Andrew Dunn (Director of Photography), Michael Brook (Original Music Composer), Inbal Weinberg (Production Design) more..., Lianne Halfon (Producer), Russell Smith (Producer), Stephen Chbosky (Executive Producer), James Powers (Executive Producer), Mary Vernieu (Casting), Venus Kanani (Casting), Diane H. Newman (Script Supervisor), David C. Robinson (Costume Designer), Keith Seymour (Key Grip), James Powers (Unit Production Manager), Blaise Corrigan (Stunt Coordinator), Joe Barnett (Sound Re-Recording Mixer), Merissa Lombardo (Set Decoration), Noel Vought (Foley Artist), Gregory A. Weimerskirch (Art Direction), Eric Bergman (Post Production Supervisor), Evelyne Noraz (Makeup Department Head), Perry Robertson (Supervising Sound Editor), Gregg Barbanell (Foley Artist), John Bramley (Still Photographer), Marshall Garlington (Sound Re-Recording Mixer), Bruce Tanis (Sound Editor), Suzy Mazzarese-Allison (Hair Department Head), Janice F. Sperling (Production Supervisor), Scott Sanders (Supervising Sound Editor), Adam Avitabile (Visual Effects Supervisor), Russell Tyrrell (Special Effects Coordinator), Natalie Angel (Production Coordinator), Alexandra Patsavas (Music Supervisor), Nancy Keslar (Key Hair Stylist), Trevor Metz (Sound Editor), Jeffree Bloomer (Sound Mixer), Anthony Cargioli (Boom Operator) and others.