| Scarlett Johansson | Nicole |
| Laura Dern | Nora Fanshaw |
| Merritt Wever | Cassie |
| Adam Driver | Charlie |
| Ray Liotta | Jay |
| Julie Hagerty | Sandra |
| Mark O'Brien | Carter |
| Wallace Shawn | Actor |
| Alan Alda | Bert Spitz |
| Kyle Bornheimer | Ted |
| Mickey Sumner | Beth |
| Azhy Robertson | Henry |
| Matthew Maher | Theater Actor |
| Robert Smigel | Mediator |
| Ayden Mayeri | Makeup Artist |
| Roslyn Ruff | Donna |
| Mary Hollis Inboden | Associate |
| Brooke Bloom | Mary Ann |
| Martha Kelly | The Evaluator |
| Albert Jones | Donna's Husband |
Technical Credits
| Noah Baumbach | Director,Producer,Screenwriter |
| Douglas Aibel | Casting |
| Mark Bridges | Costumes/Costume Designer |
| Leslie Converse | Associate Producer |
| Jade Healy | Production Designer |
| David Heyman | Producer |
| Andrew Hull | Art Director |
| Jennifer Lame | Editor |
| Francine Maisler | Casting |
| Randy Newman | Score Composer |
| Joshua Petersen | Art Director |
| Robbie Ryan | Cinematographer |
| Craig Shilowich | Executive Producer |