 Anne HathawayKym Buchman | Kym Buchman |
 Rosemarie DeWittRachel Buchman | Rachel Buchman |
 Bill IrwinPaul Buchman | Paul Buchman |
 Debra WingerAbby Buchman | Abby Buchman |
 Tunde AdebimpeSidney Williams | Sidney Williams |
 Mather ZickelKieran | Kieran |
 Anna Deavere SmithCarol | Carol |
 Anisa GeorgeEmma | Emma |
 Robyn HitchcockWedding Guest | Wedding Guest |
 'Sister' Carol EastWedding Guest | Wedding Guest |
 Beau SiaWedding Czar | Wedding Czar |
| CCarol Jean LewisSidney's Mom | Sidney's Mom |
 Fab 5 FreddyRehearsal Dinner Guest | Rehearsal Dinner Guest |
 Andre B. BlakeInspired Stylist | Inspired Stylist |
 Roger CormanWedding Guest | Wedding Guest |
 Tamyra GraySinging Friend | Singing Friend |
 Victoria HaynesBridesmaid | Bridesmaid |
| KKyrah JulianSidney's Sister | Sidney's Sister |
 Roslyn RuffRosa | Rosa |
 Sebastian StanWalter | Walter |
 Annaleigh AshfordQuick Stop Cashier | Quick Stop Cashier |
| ZZafer TawilViolin Friend | Violin Friend |
| IInnbo ShimWedding Planner | Wedding Planner |
| EEliza SimpsonWedding P.A. | Wedding P.A. |
 Quincy Tyler Bernstine12-Step Receptionist | 12-Step Receptionist |
| MMel Jones12-Step Speaker | 12-Step Speaker |
 Darrell Larson12-Step Group Leader | 12-Step Group Leader |
 Michelle Federer12-Step Reader | 12-Step Reader |
| MMatt Stadelmann12-Step First-Timer | 12-Step First-Timer |
| MMolly Hickok12-Step Veteran | 12-Step Veteran |
