Anne Hathaway as Kym Buchman

Rosemarie DeWitt as Rachel Buchman

Bill Irwin as Paul Buchman

Debra Winger as Abby Buchman

Tunde Adebimpe as Sidney Williams

Mather Zickel as Kieran

Anna Deavere Smith as Carol

Anisa George as Emma

Robyn Hitchcock as Wedding Guest

'Sister' Carol East as Wedding Guest

Beau Sia as Wedding Czar

Carol Jean Lewis as Sidney's Mom

Fab 5 Freddy as Rehearsal Dinner Guest

Andre B. Blake as Inspired Stylist

Roger Corman as Wedding Guest

Tamyra Gray as Singing Friend

Victoria Haynes as Bridesmaid

Kyrah Julian as Sidney's Sister

Roslyn Ruff as Rosa

Sebastian Stan as Walter

Annaleigh Ashford as Quick Stop Cashier

Zafer Tawil as Violin Friend

Innbo Shim as Wedding Planner

Eliza Simpson as Wedding P.A.

Quincy Tyler Bernstine as 12-Step Receptionist

Mel Jones as 12-Step Speaker

Darrell Larson as 12-Step Group Leader

Michelle Federer as 12-Step Reader

Matt Stadelmann as 12-Step First-Timer

Molly Hickok as 12-Step Veteran

Big Jim Wheeler as 12-Step Meeting Member

Josh Broder as 12-Step Meeting Member

Stephen Richardson as 12-Step Meeting Member

Bruce Bennetts as 12-Step Meeting Member

Paul Sparks as 12-Step Meeting Member

Caroline Goodman-Thomases as 12-Step Meeting Member

Daniel Wolff as 12-Step Meeting Member

Jill Dalton as 12-Step Meeting Member

Joe Alessi as 12-Step Meeting Member

Jordan Cael as 12-Step Meeting Member

Tiffany Little Canfield as 12-Step Meeting Member

Barry Eastmond Jr. as Wedding Drummer

Brooklyn Demme as Wedding Guitarist

John Anthony as Sidney's Dad

Herreast Harrison as Sidney's Grandmother

Gonzales Joseph as Cousin Joe

Donald Harrison Jr. as Rehearsal Dinner Guest

Jim Roche as Rehearsal Dinner Guest

Jimmy Joe Roche as Rehearsal Dinner Guest

Robert W. Castle as Rehearsal Dinner Guest

Paul Lazar as Rehearsal Dinner Guest

Amir El Saffar as Rehearsal Dinner Guest

Dorian Missick as Rehearsal Dinner Guest

Tareq Abboushi as Rehearsal Dinner Guest

Tavish Graham as Rehearsal Dinner Guest

Dimitrios Mikelis as Rehearsal Dinner Guest

Gaida Hinnawi as Rehearsal Dinner Guest

Alix Derrick as Rehearsal Dinner Guest

Matt Rabinowitz as Rehearsal Dinner Guest

Stephanie McBride as Rehearsal Dinner Guest

Richard Maxwell as Rehearsal Dinner Guest

Jerome Le Page as Andrew

DeQuina Moore as Rachel's Stylist

Joe Toutebon as Police Officer

Edie Hofstatter as 1st Paramedic

Jaime Garcia as Other Paramedic

Julio 'Goya' Pagan as Tow-Truck Operator

Van Hughes as Wedding Valet

Robert Merrill as Wedding Guest

Brian Nelson as Wedding Guest

David Neumann as Wedding Guest

Edisa Weeks as Wedding Guest

Heather Christian as Wedding Guest

Jennie Liu as Wedding Guest

Johnny Farraj as Wedding Guest

Joshua Elrod as Wedding Guest

Maria Dizzia as Wedding Guest

Marie Runyon as Wedding Guest

Ray Ultarte as Wedding Guest

Tymberly Canale as Wedding Guest

Anita Sarko as Wedding Guest

Joey Perillo as Wedding Guest

Christy Pusz as Wedding Guest

Jos Demme as Wedding Guest

Daphne Rubin-Vega as Wedding Guest

Marin Ireland as Angela Paylin

Joyce George as Wedding Photographer

Stephany Boa as Guest Electric Guitarist

Derrick Williams as Dancemaster

Elizabeth Hayes as Susanna Galeano

Cyro Baptista as Wedding Party Guest

Jose Mauricio De Faria as Samba Troupe Member

Michelle Clay as Samba Troupe Member

Lisette Santiago De Faria as Samba Troupe Member

Silvana Marquina as Samba Troupe Member

Marcus Santos as Samba Troupe Member

Atlanta Foresyth as Samba Troupe Member

Eldio 'Cabello' Rolim as Samba Troupe Member

Tonia-Cara Forsters as Lady in Red

Kate Rossi as Lady in Red

Susan Helen van der Griend as Lady in Red

Juliet Teakle as Lady in Red

Olive Hui as Caterer (uncredited)