After his first date at age 15 ended with the girl making out with another man at a party, aspiring writer Lester Grimm has treated all his girlfriends with jealousy and suspicion. While dating Ramona Ray, paranoia gets the best of him when he discovers that her most recent ex is successful novelist Dashiell Frank. Lester begins attending the same group therapy sessions as Dashiell to learn about Ramona's past with him.
| Writing | Noah Baumbach | Writer |
| Directing | Noah Baumbach | Director |
| Production | Chris Eigeman | Associate Producer |
| Production | Joel Kastelberg | Producer |
| Production | Victoria McGarry | Line Producer |
| Production | Eric Stoltz | Executive Producer |
| Sound | Robert Een | Original Music Composer |
| Sound | Dean Wareham | Original Music Composer |
| Camera | Steven Bernstein | Director of Photography |
| Editing | J. Kathleen Gibson | Editor |
| Production | Todd M. Thaler | Casting |
| Art | Anne Stuhler | Production Design |
| Art | Roswell Hamrick | Art Direction |
| Art | Candis Heiland | Set Decoration |
| Costume & Make-Up | Janie Bryant | Costume Design |
| Sound | William Ewart | Music Supervisor |
| Production | William Perkins | Production Supervisor |
| Directing | Michael A. Allowitz | First Assistant Director |
| Directing | Dena Gittelman | Second Assistant Director |
| Directing | Susie Balaban | Second Second Assistant Director |
| Camera | Joseph E. Gallagher | Camera Operator |
| Camera | Paul Horn | First Assistant Camera |
| Camera | Fred Nielson | Second Assistant Camera |
| Camera | Rick Raphael | Steadicam Operator |
| Camera | John Clifford | Still Photographer |
| Sound | Jeff Pullman | Production Sound Mixer |
| Sound | Jeanne Gilliland | Boom Operator |
| Directing | Sheila Waldron | Script Supervisor |
| Art | Georges N. Krivobok | Leadman |
| Art | Noah Baumbach | Set Dresser |
| Art | Brian Buteau | Set Dresser |
| Art | Nick Houghton | Set Dresser |
| Art | Tim K. Smith | Property Master |
| Art | Rebecca Meis DeMarco | Assistant Property Master |
| Art | Timothy Rehwaldt | Construction Coordinator |
| Art | Magdalene Sim | Art Department Coordinator |
| Lighting | Richard Audino | Gaffer |
| Lighting | Tom Potoskie | Best Boy Electric |
| Camera | Paul Nickason | Key Grip |
| Camera | Andrew Sweeney | Best Boy Grip |
| Camera | Howard Davidson | Dolly Grip |
| Camera | Daniel Beaman | Additional Grip |
| Camera | Jay Geller | Additional Grip |
| Camera | Kevin Smyth | Additional Grip |
| Camera | Justin Vanson | Additional Grip |
| Camera | Roger Kimpton | Additional Grip |
| Camera | William D. Moran | Additional Grip |
| Camera | Mel Noped | Additional Grip |
| Camera | Kermit Cole | Additional Grip |
| Camera | Joseph Donohue | Additional Grip |
| Camera | John Gabriele | Additional Grip |
| Camera | Ryan Gallagher | Additional Grip |
| Editing | Hilary Peabody | First Assistant Editor |
| Production | Andrew Saxe | Location Manager |
| Production | Jan Ellen Goldstein | Assistant Location Manager |
| Production | Stuart Nicolai | Unit Manager |
| Costume & Make-Up | Kate Biscoe | Key Makeup Artist |
| Costume & Make-Up | Rose Chatterton | Key Hair Stylist |
| Costume & Make-Up | Scott W. Farley | Additional Hairstylist |
| Costume & Make-Up | Michele Paris | Additional Hairstylist |
| Costume & Make-Up | Marie Abma | Assistant Costume Designer |
| Costume & Make-Up | Melaine D. Lewison | Wardrobe Supervisor |
| Production | Darlyne R. Baugh | Production Coordinator |
| Production | Peter E. Nunnery | Assistant Production Coordinator |
| Production | Cliff Fuller | Production Secretary |
| Production | Pietro Lorino, Jr. | Production Accountant |
| Production | Abby Bailey | Assistant Accountant |
| Production | Gayle Keller | Casting Associate |
| Production | Ulysses Terrero | Extras Casting |
| Sound | Trevor Jolly | Sound Supervisor |
| Sound | Trevor Jolly | Dialogue Editor |
| Sound | Andre Bacha | Dialogue Editor |
| Sound | Mark Choi | Sound Effects Editor |
| Sound | John K. Adams | Sound Effects Editor |
| Sound | Julie Lucas | First Assistant Sound Editor |
| Sound | Patricia Lamberti | Assistant Sound Editor |
| Sound | James Gardner | Assistant Sound Editor |
| Sound | Ken S. Polk | Sound Re-Recording Mixer |
| Sound | David Behle | Sound Recordist |
| Sound | Chad Algarin | Sound Recordist |
| Sound | Nick Neutra | Foley Mixer |
| Sound | Dario Biscaldi | Foley Artist |
| Sound | Patrick Cabral | Foley Artist |
| Sound | Cynthia Merrill | Foley Artist |
| Sound | Leonard Marcel | Music Editor |
| Sound | Jackson Schwartz | ADR Mixer |
| Sound | Paul J. Zydel | ADR Mixer |
| Sound | Kimaree Long | ADR Editor |
| Sound | Drew Webster | ADR Recordist |
| Sound | Douglas Murray | ADR Recordist |
| Crew | Brian Maxwell | Transportation Captain |
| Crew | Donald Sweeney | Transportation Co-Captain |
| Editing | Theresa Repola Mohammed | Negative Cutter |
| Editing | Jim Passon | Color Timer |
| Crew | Julie Rudd | Unit Publicist |
