 | Adiel Stein als Pete O'Malley |
 | Mike Weinberg als Danny Jacobsen |
 | Aidan Quinn als Joe O'Malley |
 | Bonnie Hunt als Margaret O'Malley |
 | Kevin Pollak als Rabbi Jacobsen |
 | Eddie Kaye Thomas als Patrick O'Malley |
| Lisa Dodson als Mrs. Jacobsen |
 | Brian Dennehy als Father Kelly |
 | Peggy Roeder als Sister Leonora Mary |
| Martin Hughes als Jimmy |
| Will Malnati als Eddie O'Malley |
| Lindsay Light als Katie O'Malley |
 | John Gleeson Connolly als Roger O'Malley |
 | John Sierros als Jack |
| Amanda Koblin | Casting |
| Pete Jones | Director |
| Pete Jones | Writer |
| Danny Lux | Original Music Composer |
| Ben Affleck | Producer |
| Matt Damon | Producer |
| Chris Moore | Producer |
| Gregg Featherman | Editor |
| Devorah Herbert | Production Design |
| Peter Biagi | Director of Photography |
| Stacy Ellen Rich | Costume Design |
| Mary 'Dugan' Buono | Hairstylist |
| Martha Ring | Set Decoration |
| Michelle Sy | Executive Producer |
| Patrick Peach | Executive Producer |
| Denise Wynbrandt | Key Makeup Artist |
| Jeff Balis | Co-Producer |
| Alex Keledjian | Associate Producer |
| Joseph Middleton | Casting |
| Michelle Morris | Casting |
| Linda Perlin | Stunts |
