Bruce Willis
Michelle Pfeiffer
Colleen Rennison
Jake Sandvig
Casey Boersma
Tim Matheson
Rob Reiner
Julie Hagerty
Rita Wilson
Dylan Boersma
Bruce Willis as Ben Jordan
Michelle Pfeiffer as Katie Jordan
Colleen Rennison as Erin Jordan at Ten
Jake Sandvig as Josh Jordan at Twelve
Casey Boersma as Josh Jordan at Two and a Half
Tim Matheson as Marty
Rob Reiner as Stan
Julie Hagerty as Liza
Rita Wilson as Rachel
Dylan Boersma as Josh Jordan at Three
Ken Lerner as Dr. Rifkin
Victor Raider-Wexler as Dr. Hopkins
Albert Hague as Dr. Siegler
Jayne Meadows as Dot
Tom Poston as Harry