Bruce Willis
Ben Jordan
Michelle Pfeiffer
Katie Jordan
Rob Reiner
Stan Kogen
Colleen Rennison
Erin Jordan (at Ten)
Jake Sandvig
Josh Jordan (at Twelve)
Julie Hagerty
Liza
Rita Wilson
Rachel Kogen
Paul Reiser
Dave
Red Buttons
Arnie Jordan
Betty White
Lillian Jordan
Jayne Meadows
Dot
Tom Poston
Harry
Casey Boersma
Josh Jordan (at Two and a Half)
Dylan Boersma
Josh Jordan (at Three)
Ken Lerner
Dr. Rifkin
Albert Hague
Dr. Siegler
Michael Chapman
Waiter
Jessie Nelson
Realtor
Bill Kirchenbauer
Eddie Kirby (wrongly listed as "Andy" in credits)
Norman Fessler
Maitre'd (uncredited)