Dudley Moore (Rob Salinger)
Amy Irving (Maude Salinger)
Ann Reinking (Micki Salinger)
Richard Mulligan (Leo Brody)
George Gaynes (Dr. Eugene Glztszki)
Wallace Shawn (Dr. Elliot Fibel)
Richard Drown (Stunt Double)
Ruth Silveira (Micki's Nurse)
Peter Nicholas (Male Model)
Jamie Abbott (Frank Lanford)
Emma Walton (Maude's Nurse)
Gustav Vintas (Dr. Kondoleon)
Joe Davis (Male Model)
Jack "Wildman" Armstrong (Wrestler)
John J. Flynn Jr. (Madman O'Rourke)
Jerry Martin (Security Guard)
Tina Theberge (Maid of Honor)
Marc Harris (3-Year-Old Boy)
Christa Denton (Alice Lanford)
Roger Rose (Newscaster)
Andre the Giant (Andre the Giant)
Hanna Hertelendy (Admissions Clerk)
Wiley Harker (Oliver Cushing III)
Gerry Gibson (Ben Sitkowitz)
Edith Fields (Valerie Sitkowitz)
Lou Felder (Sales Clerk)
Phillippe Denham (TV Cameraman)
Ed Call (Campaign Manager)
Billy Beck (Finn)
Robby Kiger (Ehren Lanford)
Virginia Kiser (Mrs. Lanford)
Ken Olfson (Interior Decorator)
Jaime McEnnan (5-Year-Old Boy)
Robert Nadder (Geologist)
Tiiu Leek (Newscaster)
Gene Lebell (Wrestling Referee)
Robert Symonds (Ezra Hutchinson)
George Coe (Governor Lanford)
John Pleshette (Hap Ludlow)
H.B. Haggerty (Barkhas Guillory)
Lu Leonard (Nurse Verbeck)
Priscilla Pointer (Diana Hutchinson)