 | Anna Kendrick als Eloise McGarry |
 | Craig Robinson als Jerry Kepp |
 | June Squibb als Jo Flanagan |
 | Lisa Kudrow als Bina Kepp |
 | Stephen Merchant als Walter Thimble |
 | Tony Revolori als Renzo Eckberg |
 | Wyatt Russell als Teddy Millner |
 | Amanda Crew als Nikki |
 | Becky Ann Baker als Carol Millner |
 | Thomas Cocquerel als Huck Hayes |
 | Maria Christina Thayer als Kate Millner |
 | Andy Daly als Luke Pfaffler |
 | Andy Stahl als Henry Grotsky |
 | Chris Whitley als Douglas Grotsky |
 | Margo Martindale als Freda Eckberg |
 | Megan Lawless als Megan-Ann |
 | Sheri Mann Stewart als Sherri Grotsky |
 | Richard Haylor als Roger Millner |
 | Carlos Aviles als Jalapeño |
 | Chelle Ramos als Rodriguez Bride |
 | Brad Oberhofer als Wedding Singer |
 | Jay Klaitz als Photographer |
 | Andy Blitz als Notorious Donny Haczyk |
 | Max Silvestri als Champagne Server |
 | Nick Arapoglou als Receptionist |
 | Matthew Cornwell als Drunk Military Buddy |
 | Rya Meyers als Francie Millner |
 | Charles Green als Mr. Manny |
 | Elizabeth Faith Ludlow als Caterer |
 | Omer Mughal als Hotel Staff Member |
 | Gabriella Cila als Renzo's Study Buddy |
 | Lontrell Anderson als Server (uncredited) |
| Nargis Aniston als Bridesmaid (uncredited) |
 | Tommy O'Brien als Robert Vardaros (uncredited) |
| Amanda Burke Buczek als Bridesmaid (uncredited) |
| Kelsey Cortez als Server (uncredited) |
| Payson Durant als Wedding Guest (uncredited) |
| Shannon Edwards als Milner Business Associate (uncredited) |
 | Fred Galle als Wealthy Family Friend (uncredited) |
| Matthew A. Hand als Wedding Guest (uncredited) |
| Geoffrey Howard als Wedding Guest (uncredited) |
| Lainey Kloes als Wedding Guest (uncredited) |
| Susan Lafayette Moss als Maid (uncredited) |
| Roger Neal als Wedding Guest (uncredited) |
| Stacey Parrish als Bridesmaid (uncredited) |
| Shaker Sangam als Wedding Guest (uncredited) |
| Garret Ethan Whittington als Single Bachelor (uncredited) |
| Jeffrey Blitz | Director |
| Peter Brown | Sound Designer |
| Jeremy Kipp Walker | Executive Producer |
| P. Jennifer Dana | Producer |
| Shawn Levy | Producer |
| Tom McNulty | Producer |
| Sheldon Rabinowitz | Executive Producer |
| Ross Jacobson | Executive Producer |
| John Swihart | Music |
| Ben Richardson | Director of Photography |
| Yana Gorskaya | Editor |
| Rachel Tenner | Casting |
| Timothy David O'Brien | Production Design |
| Brittany Hites | Art Direction |
| Peggy Stamper | Costume Design |
| Kimberly Blaurock | Art Department Coordinator |
| Rich Koll | Construction Coordinator |
| Laurie Garner | Property Master |
| Tara Feldstein Bennett | Casting |
| Chase Paris | Casting |
| Charlene Lee | Casting Associate |
| Caitlin McKenna | ADR Voice Casting |
| Kerry Kaz | Casting Assistant |
| Fred Lloyd | Assistant Costume Designer |
| Daniel George | Costume Supervisor |
| Jim Alan Cook | Key Costumer |
| LaShana Clayton | Seamstress |
| Laura Reinker | Set Costumer |
| Toniet Gallego | Set Costumer |
| Shie Rozow | Music Editor |
| Andrea von Foerster | Music Supervisor |
| Melissa Randle | Script Supervisor |
| Quincy Lamar Wills | Choreographer |
| Jeff Crumbley | Camera Operator |
| Tim Fabrizio | Camera Operator |
| Dave Isern | Steadicam Operator |
| Curtis Bonds Baker | Still Photographer |
| Jace Downs | Still Photographer |
| Denny Mooradian | Gaffer |
| Jeremy Fenix Johnson | Rigging Gaffer |
| Benny Smyth | Key Grip |
| Richard Nathan Shapiro | Dialogue Editor |
| Robert Vardaros | Boom Operator |
| Paul Aulicino | Foley |
| Mike Horton | Foley |
| Ando Johnson | Sound Effects Editor |
| Andy Koyama | Sound Re-Recording Mixer |
| Peter Brown | Supervising Sound Editor |
| Voni Hinkle | Hair Department Head |
| Haley Hinkle | Hairstylist |
| Talya Melvey | Key Hair Stylist |
| Essie Cha | Makeup Department Head |
| Nesrin Ismail | Key Makeup Artist |
| Lisa Clark | Makeup Artist |
| Kostas Theodosiou | Digital Intermediate |
| Kelley Sims | Production Supervisor |
| TK Shom | First Assistant Director |
| Nelson Hagood | Leadman |
| Preston Jacob | Set Dresser |
| Kristen Jenkins | Set Designer |
| Marissa Korchak | Set Dresser |
| Steven Ondrejech | Set Dresser |
| Chris Jargo | ADR & Dubbing |
| Donny Carrington | Stunt Double |
| Johnny Cooper | Utility Stunts |
| Bob Fisher | Stunt Coordinator |
| Marian Green | Stunt Double |
| Jasi Cotton Lanier | Stunt Double |
| Ashley Rae Trisler | Stunt Double |
| Jackson McDonald | First Assistant "A" Camera |
| Saul McSween | Second Assistant "B" Camera |
| Alex Mooradian | Lighting Technician |
| Tony Murima | Lighting Technician |
| Tom Novell | Lighting Technician |
| Reid Stegall | Lighting Technician |
| Tony Summerlin | First Assistant "B" Camera |
| Aaron Willis | Second Assistant "A" Camera |
| Heather Hylton Bivens | Extras Casting |
| Richard Sanchez | Assistant Editor |
| Kai Thorup | Location Manager |
| Nina Hodge | Production Coordinator |
| Jeffrey Blitz | Screenplay |
| Jay Duplass | Story |
| Mark Duplass | Story |
| Mark Roberts | Producer |
