| Name | Character |
|---|---|
| Anna Kendrick | Stephanie Smothers |
| Andrew Rannells | Darren |
| Bashir Salahuddin | Detective Summerville |
| Blake Lively | Emily Nelson |
| Michele Morrone | Dante Versano |
| Henry Golding | Sean Townsend |
| Elena Sofia Ricci | Portia Versano |
| Allison Janney | Aunt Linda McLanden |
| Elizabeth Perkins | Margaret McLinden |
| Name | Character |
|---|---|
| Joshua Satine | Miles Smothers |
| Mitch Salm | Swim Coach |
| Diletta Jayne | Lulu |
| Holmes | Camp Counselor Val |
| Aparna Nancherla | Sona |
| Kelly McCormack | Stacy |
| Alex Newell | Vicky |
| Kate Rachesky | Bookstore Clerk |
| Melanie Neu | Bookstore Fan |
| Taylor Ortega | Agent Irene Walker |
| Sylvia Sakellaridis | Flight Attendant |
| Hilary Belle Walker | Chic Woman |
| Silvio Caldarozzi | Truck Driver |
| Ian Ho | Nicky Nelson |
| Lorenzo de Moor | Matteo Bartolo |
| Sandro Bersani | Bartolo Goon |
| Claudio Vanni | Bartolo Goon |
| Sophia Angelozzi | Housekeeper |
| Max Malatesta | Detective Antonio Lucchese |
| Giulio Anese | Wedding Priest |
| Gianluigi Lembo | Wedding Singer |
| Alessandro Palazzi | Alessandro the Bartender |
| Anita Pititto | Maid |
| Massimiliano Viola | Capri Police Officer |
| Alessandra Pacifico | Young Linda |
| Jade Pirovano | Young Margaret |
| Jake Tapper | Self |
| Guido Della Gatta | Anema e Core Band |
| Claudio Sannino | Anema e Core Band |
| Ennio Scarpa | Anema e Core Band |
| Emilio Silva Bedmar | Anema e Core Band |
| Aldo Capasso | Anema e Core Band |
| Giuseppe Panico | Anema e Core Band |
| Alessio Busanca | Anema e Core Band |
| Riccardo Nebbiosi | Anema e Core Band |
| Andrea De Rosa | String Quartet Musician |
| Denise Terranegra | String Quartet Musician |
| Michelangelo Cotrufo | String Quartet Musician |
| Fabio Galoppi | String Quartet Musician |
| Alessandra Tumolillo | Alessandra Tumolillo Jazz Trio |
| Arabella Rustico | Alessandra Tumolillo Jazz Trio |
| Elizabetta Saviano | Alessandra Tumolillo Jazz Trio |
| Director |
| Paul Feig |
| First Assistant Director(s) |
| Antonio Corsini |
| Jacopo Fournier |
| John R Saunders |
| Second Assistant Director(s) |
| Triini Selgis |
| First Assistant Diretor-Second Unit |
| Producer(s) |
| Paul Feig |
| Laura Allen Fischer |
| Brenda Gilbert |
| Paris Kassidokostas-Latsis |
| Executive Producer(s) |
| Jennifer Booth |
| Jason Cloth |
| Jean-Luc De Fanti |
| Terry Dougas |
| Aaron L Gilbert |
| Paris Kassidokostas-Latsis |
| Marco Valerio Pugini |
| Jessica Sharzer |
| Associate Producer(s) |
| Zoe Dennis |
| Music Director(s) |
| Theodore Shapiro |
| Background Music Scorer(s) |
| Chris Barrett |
| Chris Fogel |
| Screenwriter |
| Darcey Bell |
| Jessica Sharzer |
| Laeta Kalogridis |
| Script Supervisor |
| Daniela Saioni |
| Cinematographer |
| John Schwartzman |
| Film Editor(s) |
| Brent White |
| Production Company(s) |
| Amazon MGM Studios |
| Amazon Studios |
| BRON Studios |
| Distributing Company(s) |
| Amazon MGM Studios |