| Actor ("1st Phone Call Flirt"): | Paz de la Huerta |
| Actor ("Al"): | Wade Mylius |
| Actor ("Amelia (Age 1)"): | Kaitlyn Pick |
| Actor ("Amelia (Age 3)"): | Samantha Reale |
| Actor ("Amelia (Age 6)"): | Samantha Lucier |
| Actor ("Amelia (Age 8)"): | Skye McCole Bartusiak |
| Actor ("Amelia Forrester"): | Maggie Gyllenhaal |
| Actor ("Aunt Ann"): | Maryann Urbano |
| Actor ("Baby Walker"): | Jared Scott |
| Actor ("Beverly D'Onofrio (Age 11)"): | Mika Boorem |
| Actor ("Beverly D'Onofrio"): | Drew Barrymore |
| Actor ("Bobby"): | Desmond Harrington |
| Actor ("Christina Barr"): | Sara Gilbert |
| Actor ("Cindy"): | Kristin Proctor |
| Actor ("Cop"): | Carl Capotorto |
| Actor ("Cop"): | Robert Greenhut |
| Actor ("Counselor"): | Jon Korkes |
| Actor ("D'Onofrio Cousin"): | Heather Hodder |
| Actor ("Dennis Forrester"): | Michael Linstroth |
| Actor ("Fay Hope Forrester"): | Brittany Murphy |
| Actor ("Heald Family Member"): | Richard Keith |
| Actor ("Jail Ward"): | Kevin O'Rourke |
| Actor ("Janet (Age 12)"): | Olivia Morgan Scheck |
| Actor ("Janet (Age 19)"): | Marisa Ryan |
| Actor ("Janet (Age 8)"): | Celine Marget |
| Actor ("Jason (Age 1)"): | Skye Arens |
| Actor ("Jason (Age 2)"): | Robert Salerno |
| Actor ("Jason (Age 2)"): | Patrick Salerno |
| Actor ("Jason (Age 3)"): | Logan Arens |
| Actor ("Jason (Age 6)"): | Cody Arens |
| Actor ("Jason (Age 8)"): | Logan Lerman |
| Actor ("Jason (Baby)"): | Briana Tilden |
| Actor ("Jason (Newborn)"): | Joseph M. Cannizaro |
| Actor ("Jason (Newborn)"): | Noah Hartwick |
| Actor ("Jason D'Onofrio"): | Adam Garcia |
| Actor ("Jenny"): | Aleksia Landeau |
| Actor ("Karen"): | Temple Brooks |
| Actor ("Karen's Friend"): | Lauren Lake |
| Actor ("Kevin"): | Jordan Gelber |
| Actor ("Linebacker"): | Vincent De Paul |
| Actor ("Linebacker"): | Joseph Cassese |
| Actor ("Lizard"): | David Moscow |
| Actor ("Louie"): | John DeGrazio |
| Actor ("Mark"): | Kevin Thoms |
| Actor ("Mary"): | Marilyn Spanier |
| Actor ("Mr. Forrester"): | John Bedford Lloyd |
| Actor ("Mr. Leonard D'Onofrio"): | James Woods |
| Actor ("Mrs. Forrester"): | Susan Forristal |
| Actor ("Mrs. Teresa D'Onofrio"): | Lorraine Bracco |
| Actor ("Nurse"): | Tracy Reiner |
| Actor ("Pete"): | Gene Canfield |
| Actor ("Phone Flirt"): | Nicole Winston |
| Actor ("Raymond Hasek"): | Steve Zahn |
| Actor ("Shirley Perro"): | Rosie Perez |
| Actor ("Sky Barrister"): | Gabriel Carpenter |
| Actor ("Sophia"): | Sophia Barricelli |
| Actor ("Student-Secretary from '69"): | Robin Paul |
| Actor ("Sweeny's Owner"): | Gaetano Lisi |
| Actor ("Tommy Butcher"): | Peter Facinelli |
| Actor ("Townie Girl"): | Alissa Dean |
| Actor ("Townie Girl"): | Sara Klingebiel |
| Actor ("Townie Girl"): | Jessica Leshnower |
| Actor ("Townie Girl"): | Randi Rosenholtz |
| Actor ("Uncle Lou"): | Vincent Pastore |
| Actor ("Wedding Singer Tony"): | Dusty Rizzo |
| Actor ("Zippy"): | Sean Liotine |
| Author: | Beverly D'Onofrio |
| Cinematography: | Miroslav Ondricek |
| Co-Producer: | Amy Lemisch |
| Co-Producer: | Beverly D'Onofrio |
| Co-Producer: | Timothy M. Bourne |
| Director: | Penny Marshall |
| Editor: | Lawrence Jordan |
| Editor: | Richard Marks |
| Executive Producer: | Bridget Johnson |
| Executive Producer: | Morgan Ward |
| Original Music: | Hans Zimmer |
| Original Music: | Heitor Pereira |
| Producer: | James L. Brooks |
| Producer: | Richard Sakai |
| Producer: | Laurence Mark |
| Producer: | Sara Colleton |
| Producer: | Julie Ansell |
| Screenplay: | Morgan Upton Ward |
