Julia Roberts as Julianne Potter

Dermot Mulroney as Michael O'Neal

Cameron Diaz as Kimmy Wallace

Rupert Everett as George Downes

Philip Bosco as Walter Wallace

M. Emmet Walsh as Joe O'Neal

Rachel Griffiths as Samantha Newhouse

Carrie Preston as Amanda Newhouse

Susan Sullivan as Isabelle Wallace

Christopher Masterson as Scotty O'Neal

Raci Alexander as Title Sequence Performer

Jennifer Garrett as Title Sequence Performer

Kelleia Sheerin as Title Sequence Performer

Bree Turner as Title Sequence Performer

Cassie Creasy as Flower Girl

Lucina Paquet as Kimmy's Grandma

Aida Baggio as Old Woman #2

Shirley Kelly as Oldest Lady

George Bozonelos as Party Guest

Loretta Paoletti as Party Guest

Joseph Sikora as Stoner Guy #1

Shale Marks as Stoner Guy #2

Phillip Ingram as Wedding Singer

Rose Abdoo as Seamstress

JoBe Cerny as Tailor

Paul Giamatti as Bellman

Charlie Trotter as Charlie Trotter

Guillermo Téllez as Chef

Ned Schmidtke as Captain

Mark Swenson as Karaoke Singer

Mara Casey as Karaoke Girl

Tonray Ho as Karaoke Waitress

Michelle Hutchison as Drunken Trashy Girl

Robert Sutter as Crabhouse Pianist

Charlotte Zucker as Customer

Susan Breslau as Customer

Burton Zucker as Customer

Sharon Haight as Customer

Nydia Rodriguez Terracina as Walter's Secretary

Mike Bacarella as Office Janitor

Larry Santori as Conductor

Gene Janson as Sport Magazine Guy

Kevin Michael Doyle as Sport Magazine Guy

Scott Kuhagen as Werner

Sid Hillman as Dining Guest

Norman Merrill as Dining Guest

Renata Scott as Dining Guest

Anh Duong as Dining Guest

Harry Shearer as Jonathan P.E. Rice

Jennifer McComb as Excited Woman

Mary-Pat Green as Angry Woman

Davenia McFadden as Angrier Woman

Jo Farkas as Loony Woman

Chelcie Ross as Preist (uncredited)

Ray Uhler as Wedding Guest (uncredited)

Paul Adelstein as Brunch Guest (uncredited)

Stephanie Burton as Karaoke Patron (uncredited)

Kathi Copeland as Singing Chef (uncredited)

Amy Danles as Intro Bridesmaid #2 (uncredited)

Jerod Howard as Wedding Guest (uncredited)

Chris Lowe as Party Guest (uncredited)

Molly Murphy as Train Conductor (uncredited)

Eric A. Pot as Florist (uncredited)

Chelcie Ross as Priest (uncredited)

Dominic Paolo Testa as Shopper (uncredited)

Robert Velo as Taylor (uncredited)

Niko El Santo Zavero as Singing Waiter (uncredited)

Johnny White as Karaoke Patron (uncredited)

Niko El Santo Zavero as Singing Waitress (uncredited)