 | Kate Hudson als Liv |
 | Anne Hathaway als Emma |
 | Bryan Greenberg als Nate |
 | Chris Pratt als Fletcher |
 | Steve Howey als Daniel |
 | Candice Bergen als Marion St. Claire |
 | Kristen Johnston als Deb |
 | Michael Arden als Kevin |
 | Victor Slezak als Colson |
 | Kelly Coffield Park als Kathy |
 | John Pankow als John |
 | Zoe O'Grady als Young Liv |
| Shannon Ferber als Young Emma |
 | June Diane Raphael als Amanda |
| Charles Bernard als Wedding DJ |
| Emily Sarah Stikeman als Student #1 |
 | Robert Capron als Student #2 |
| Kallie Tabor als Student #3 |
 | Bruce Altman als Simmons |
 | Hettienne Park als Marissa |
 | Lauren Bittner als Amie |
 | Rena Maliszewski als Female Colleague |
 | Casey Wilson als Stacy |
 | Sarah Kate Jackson als Salesgirl |
 | Jason Kolotouros als Delivery Guy |
 | Paul Scheer als Ricky Coo |
 | André Holland als DJ Jazzles |
| Anna Madigan als Tanorexic |
 | Daniel Raymont als Colorist |
 | Jon Daly als Head Set |
| Michael Anastasia als Geeky Neighbor |
| Nicole Stuart als Receptionist |
 | Robert Scott Wilson als Rob |
| Pamela Figueiredo als Pamela |
 | Sam Pannier als Stationery Clerk |
 | John Franchi als New York Cabbie (uncredited) |
 | William Brent als (voice) |
| Jeremy Brothers als Nerdy Colleague |
 | Colin Ford als (voice) |
| Gary Winick | Director |
| Greg DePaul | Screenplay |
| Casey Wilson | Screenplay |
| June Diane Raphael | Screenplay |
| Julie Yorn | Producer |
| Kate Hudson | Producer |
| Alan Riche | Producer |
| Jennifer Euston | Casting |
| Marcia DeBonis | Casting |
| Linda Cohen | Music Supervisor |
| Ed Shearmur | Original Music Composer |
| Karen Patch | Costume Design |
| Susan Littenberg | Editor |
| Dan Leigh | Production Design |
| Frederick Elmes | Director of Photography |
| Arnon Milchan | Executive Producer |
| Jay Cohen | Executive Producer |
| Tony Ludwig | Executive Producer |
| Matt Luber | Executive Producer |
| Jonathan Filley | Executive Producer |
| Greg DePaul | Story |
| John A. Machione | Unit Production Manager |
| Jonathan Filley | Unit Production Manager |
| Glen Trotiner | First Assistant Director |
| Eddie Micallef | Second Assistant Director |
| G. A. Aguilar | Stunt Coordinator |
| Tracey Ruggiero | Stunts |
| Shawnna Thibodeau | Stunts |
| Jill Brown | Stunts |
| Stephen Mann | Stunts |
| Mark Norby | Stunts |
| Angela Quiles | Production Supervisor |
| Susannah Brengel | Production Accountant |
| James Donahue | Art Direction |
| Ron von Blomberg | Set Decoration |
| Guido DeCurtis | Leadman |
| Laura C. McPherson | Assistant Art Director |
| Lukasz Jogalla | "A" Camera Operator |
| Ralph Watson | "B" Camera Operator |
| Ralph Watson | Steadicam Operator |
| Claire Folger | Still Photographer |
| William Sarokin | Production Sound Mixer |
| George Leong | Boom Operator |
| Katri Billard | Script Supervisor |
| Susan Dawes | Supervising Sound Editor |
| Patrick Cyccone Jr. | Sound Mixer |
| James Bolt | Sound Mixer |
| Jonathan Lumley | Gaffer |
| Debra L. Tennant | First Assistant Editor |
| Rebecca Hofherr | Assistant Costume Designer |
| Trish Seeney | Makeup Department Head |
| Liz Bernstrom | Key Makeup Artist |
| Frank Barbosa | Hair Department Head |
| Margot Boccia | Makeup Artist |
| Jean Carney | Makeup Artist |
| Navya La Shay | Makeup Artist |
| Tina LaSpina | Makeup Artist |
| Monique Peoples Graham | Hairstylist |
| Paula Dion | Hairstylist |
| Mandy Lyons | Hairstylist |
| Barbara Lorenz | Hairstylist |
| Joe Rossi | Makeup Artist |
| Tanisha Scott | Choreographer |
| Shawn Caple | Production Assistant |
