 | Justin Long als Adam |
 | Cobie Smulders als Allison |
 | Ryan Hansen als Aaron |
 | John Cho als Mark |
 | Kristen Schaal als Talula |
 | Peter Gallagher als Orson Schwartzman |
 | Dana Delany als Wendy (Allison's Mom) |
 | Rick Overton als Dean (Allison's Dad) |
 | Lea Thompson als Deb (Adam's Mom) |
 | Brady Rubin als Grandma Rose |
 | Luis Guzmán als Federico |
 | Ginger Gonzaga als Helen |
 | Charlyne Yi als Claire |
 | Briga Heelan als Julie |
 | Parvesh Cheena als Rohan |
 | Malcolm Barrett als Greg |
 | Dov Tiefenbach als David |
 | Charlotte McKinney als Charlotte |
 | Manu Intiraymi als Lee |
 | Barbara Browne als Susan |
| André Tardieu als Jean-Pierre |
| Talia Toms als Leandra (Bridesmaid) |
 | Adam Rose als Alan (Co-Worker) |
 | Sam Hennings als Priest (Father Jack) |
 | Ser'Darius Blain als Wedding DJ |
 | Emerson Min als Emerson |
 | Ivy George als Ivy (Flower Girl) |
 | Babar Peerzada als Chaplin (Lead Busboy) |
| Gabriel Berber als Busboy 1 |
| Victor Douglas als Busboy 2 |
| Ricardo Martín als Wedding Photographer |
| James Krisel als Guy at Party |
 | Vella Lovell als Jen (uncredited) |
| Andrea LeBlanc als Lindsay (uncredited) |
 | Patrick Rafferty als Elevator Tourist (uncredited) |
| Mike Guerra als Engaged Couple (uncredited) |
 | Ashley Platz als Engaged Couple (uncredited) |
| Ryan Eggold | Writer |
| Ryan Eggold | Director |
| Ryan Eggold | Original Music Composer |
| Ryan Eggold | Editor |
| Seamus Tierney | Director of Photography |
| Lauren Melody Shell | Property Master |
| Cassandra Kulukundis | Casting |
| Cassandra Kulukundis | Producer |
| Ryan Eggold | Producer |
| Alexandra Rizk Keane | Producer |
| Nancy Leopardi | Producer |
| Ross Kohn | Producer |
| Marcus Cole | Co-Producer |
| Sean Rappleyea | Associate Producer |
| Callie Andreadis | Production Design |
| Annie Jewell | Costume Designer |
| John Bissell | Music Supervisor |
| Kurt Yochum | Production Manager |
| Brandon Riley | First Assistant Director |
| Sam Shapson | First Assistant Director |
| Dylan Matlock | Second Assistant Director |
| Rowan Glenn | Assistant Editor |
| James Emmerich | VFX Artist |
| Tim Mikulecky | Stunt Coordinator |
| Greg Fitzpatrick | Stunt Double |
| Ben Tardif | Stunt Double |
| Colin Ducey | Stunt Driver |
| Heather Bonomo | Stunt Driver |
| Stephen W. Schriver | Stunt Driver |
| Tom Castronovo | Art Direction |
| Nick Bonanno | Set Dresser |
| Kevin Burzynski | Set Dresser |
| Travis Witkowski | Set Dresser |
| David Peters | Set Dresser |
| Haley Keim | Property Master |
| Rose Leiker | Property Master |
| Jenny Reyes | Costume Supervisor |
| Nicole Aprea | Costumer |
| Annie Woods | Costumer |
| Brooke Mulkins | Costumer |
| Jen Martin | Costumer |
| Ivy Ermert | Makeup Department Head |
| Natalie Vermiglio | Hair Department Head |
| Anna Millhouse | Makeup & Hair Assistant |
| Brandon Cox | Camera Operator |
| Alec Nickel | First Assistant "A" Camera |
| Josef Gunawan | Second Assistant "A" Camera |
| Julia Pasternak | First Assistant "B" Camera |
| Mike Valentine | Additional First Assistant Camera |
| Noah Ramos | Loader |
| Tarik Hameedi | Steadicam Operator |
| Christopher Low | Steadicam Operator |
| Sam Akinyele | Digital Imaging Technician |
| Mark Zalewski | Digital Imaging Technician |
| Saman Yaghmai-Aledavoud | Digital Imaging Technician |
| Adrian Sierkowski | Gaffer |
| Harris Smith | Best Boy Electric |
| Robert Orozco | Electrician |
| Chad Gregersen | Electrician |
| Kyran Ford | Electrician |
| David Marmon II | Electrician |
| Rob Richards | Key Grip |
| Zac Donner | Key Grip |
| Ryan Hueter | Best Boy Grip |
| Luigi Cortez | Grip |
| Marcus Caracci | Grip |
| Spencer Smith | Grip |
| Kenneth Bauer | Grip |
| Charles Tae | Grip |
| Carlos Chavez | Grip |
| John Taylor | Sound Mixer |
| Eugene Thompson | Sound Mixer |
| Seth Cooper | Sound Mixer |
| Speed Ratliff | Boom Operator |
| Irwin Miller | Boom Operator |
| Benjamin Maus | Boom Operator |
| Josef Pinckney | Boom Operator |
| Simoné Gallon-Langton | Script Supervisor |
| Alex Guttman | Production Accountant |
| Stephanie Moore | Production Coordinator |
| Catherine Mailhouse | Producer's Assistant |
| Allan Aguilar | Second Second Assistant Director |
| J.P. Ouellette | Second Second Assistant Director |
| Kristy Hartwell | Second Second Assistant Director |
| Austin Michaelis | Key Production Assistant |
| Brian C. Chenworth | Production Assistant |
| Bianca Smith | Production Assistant |
| Scott Hainchek | Production Assistant |
| Kevin Skwarski | Production Assistant |
| Robert A. Main | Production Assistant |
| Sara Swearingen | Production Intern |
| Justine Lesourd | Production Intern |
| Monisha Dadlani | Production Intern |
| Olivia Pagano | Production Intern |
| Aubrey Rhodes | Production Intern |
| Natasha Simone | Production Intern |
| Jens Sweaney | Production Intern |
| Erika Perez | Craft Service |
| Jose Peña | Transportation Captain |
| Jason Smith | Driver |
| Brian C. Chenworth | Driver |
| Ryan Hueter | Driver |
| Ruben Acevedo | Driver |
| Paul White | Driver |
| Doug Braga | Driver |
| Michael Thompson | Driver |
| Juan Garcia Jr. | Driver |
| Robert Dargenzio | Driver |
| Chris Simpson | Set Medic |
| Brad Smith | Set Medic |
| Michael Baker | Set Medic |
| Saladin Florence | Security |
| Ernest Wilkerson | Security |
| Rick Jones | Security |
| Mara Mark | Studio Teacher |
| Sandy Santacreau | Studio Teacher |
| Natalie Crow | Studio Teacher |
| Dennis Williams | Location Manager |
| André Gower | Location Scout |
| Malia Hall | Music Coordinator |
| Joseph Cheung | First Assistant "B" Camera |
| Jerome Stolly | First Assistant "B" Camera |
| Laura F. Haynes | Production Coordinator |
| Airick Stevenson | Second Assistant Director |
| Erik Almada | Production Assistant |
| Steven Chrabascez | Production Assistant |
| Eric Louie | Production Assistant |
| Justin Jorgensen | Production Assistant |
| Ryan McRee | Production Assistant |
| Nick Stewart | Set Medic |
| Bruce Mitchell | Location Manager |
| Dan Huck | Location Assistant |
| Courtney Quirin | Location Scout |
| Megan Rumph | Digital Intermediate Producer |
| Matthew Breitenbach | Digital Intermediate Editor |
| Joshua Adeniji | Supervising Sound Editor |
| Leslie Shatz | Sound Re-Recording Mixer |
| Xander Lott | Supervising ADR Editor |
| Kristen Hirlinger | Dialogue Editor |
| Benjamin Gieschen | Sound Effects Editor |
| Vicki O'Reilly Vandegrift | Foley Artist |
| Jesus Lopez | Foley Mixer |
| Joey Eckley | Foley Editor |
| James Parnell | Assistant Sound Editor |
| Taylor Westerfield | Assistant Sound Editor |
| Austin Katzer | Assistant Sound Editor |
| Travis MacKay | ADR Mixer |
| Ginger Gonzaga | Thanks |
| Ben Kutchins | Thanks |
| Ross LaManna | Thanks |
| Bradley Rust Gray | Thanks |
| Patrick Rafferty | Thanks |
| Ella Moss | Thanks |
| Jay Cohen | Thanks |
| Rachel Antonoff | Thanks |
| Guy Godfree | Thanks |
| Ryan Eggold | Musician |
| Rob Schwimmer | Musician |
| Doug Wieselman | Musician |
| Ari Folman Cohen | Musician |
| Jordan Scannella | Musician |
| Marcus Cole | Musician |
| Marika Hughes | Musician |
| Rubin Kodheli | Musician |
| Abby Ahmad | Vocals |
| Jean-Yves Joanny | Vocals |
| David Goldman | Musician |
| Michael Weiss | Musician |
| Nick Anderson | Musician |
| Dan Rieser | Musician |
| Roy Williams | Musician |
| Dennis Litchman | Musician |
| Christina Courtin | Musician |
| Mark Marshall | Musician |
| Sasha Dobson | Vocals |
| Simon Oscroft | Musician |
| Vella Lovell | Thanks |
| Randi Rahm | Thanks |
| Alexis Field | Thanks |
| David Matlof | Thanks |
| Zachary Grace | Second Assistant "A" Camera |
