Nicole Kidman as Becca Corbett

Aaron Eckhart as Howie Corbett

Dianne Wiest as Nat

Miles Teller as Jason

Tammy Blanchard as Izzy

Sandra Oh as Gabby

Giancarlo Esposito as Auggie

Jon Tenney as Rick

Stephen Mailer as Kevin

Mike Doyle as Craig

Roberta Wallach as Rhonda

Patricia Kalember as Peg

Ali Marsh as Donna

Yetta Gottesman as Ana

Colin Mitchell as Sam

Deidre Goodwin as Reema

Julie Lauren as Debbie

Rob Campbell as Bob

Jay Wilkison as Gary

Ben Hudson as Sammy

Salli Saffioti as Lori

Ursula Parker as Lilly

Phoenix List as Danny

Sandi Carroll as Abby

Teresa Kelsey as Mary

Brady Parisella as Caden

Sara Jane Blazo as Jason's Mother

Marylouise Burke as Librarian

Jennifer Roszell as Sotheby's Receptionist

Derek Blakeney as Security guard (uncredited)

Ed Kalegi as Sotheby's Buyer (uncredited)

Jake Levy as Jason's Prom Buddy (uncredited)

Shannon McGann as Cook-out guest (uncredited)

Chris Werkmeister as Arthur (uncredited)

Shoshanna Withers as Izzy's Friend (uncredited)