Dudley Moore as Arthur Bach

Liza Minnelli as Linda Marolla

John Gielgud as Hobson

Geraldine Fitzgerald as Martha Bach

Jill Eikenberry as Susan Johnson

Stephen Elliott as Burt Johnson

Ted Ross as Bitterman

Barney Martin as Ralph Marolla

Thomas Barbour as Stanford Bach

Anne DeSalvo as Gloria

Marjorie Barnes as Hooker

Dillon Evans as Plaza Maitre D'

Maurice Copeland as Uncle Peter

Justine Johnston as Aunt Pearl

Paul Vincent as Plaza Waiter

Mary Alan Hokanson as Secretary

Paul Gleason as Executive

Phyllis Somerville as Saleslady

Irving Metzman as Security Guard

Joe Doolan as Kid in Street

John Doolan as Kid in Street

Melissa Ballan as Kid in Street

Florence Tarlow as Mrs. Nesbitt

Lou Jacobi as Plant Store Owner

Gordon Press as Prize Man

Bob Maroff as Prize Man

Marcella Lowery as Harriet

Jerome Collamore as Johnson Butler

Mark Fleischman as Waiter

Helen Hanft as Perry's Wife

John Eric Bentley as Perry

Raymond Serra as Racetrack Owner

Peter Evans as Preston

Dominic Guastaferro as Party Guest

Phil Oxnam as Orderly

Richard Hamilton as Bill

George Riddle as Bartender

Lawrence Tierney as Man in Coffee Shop

Bobo Lewis as Lady in Coffee Shop

B. Constance Barry as Wedding Guest

Kurt Schlesinger as Wedding Guest

Steve James as Man Outside Tie Store (uncredited)

Debra Lass as Bridesmaid (uncredited)

Mark Margolis as Wedding Guest (uncredited)

Marianne Muellerleile as Partygoer (uncredited)

Judi Passeltiner as Wedding Guest (uncredited)