Tom Berenger as Sam Weber

Glenn Close as Sarah Cooper

Jeff Goldblum as Michael Gold

William Hurt as Nick Carlton

Kevin Kline as Harold Cooper

Mary Kay Place as Meg Jones

Meg Tilly as Chloe

JoBeth Williams as Karen Bowens

Don Galloway as Richard Bowens

James Gillis as Minister

Ken Place as Peter the Cop

Jonathan Kasdan as Harold and Sarah's Son

Ira Stiltner as Running Dog Driver

Jake Kasdan as Autograph Seeker

Muriel Moore as Alex's Mother

Meg Kasdan as Airline Hostess

Patricia Gaul as Annie

Kevin Costner as Alex (corpse)