Walter Matthau

Henry Graham

Elaine May

Henrietta Lowell

Jack Weston

Andy McPherson

George Rose

Harold

James Coco

Uncle Harry

Doris Roberts

Mrs. Traggert

Renée Taylor

Sharon Hart

William Redfield

Beckett

Graham Jarvis

Bo

Jess Osuna

Frank

David Doyle

Mel

Fred Stewart

Mr. von Rensaeller

Mark Gordon

John

Rose Arrick

Gloria Cunliffe

Conrad Bain

Professor Heinrich (uncredited)

William Hickey

Smith (uncredited)

John O'Leary

Desk Clerk (uncredited)

Ida Berlin

Maid (uncredited)

Mildred Clinton

Mrs. Heinrich (uncredited)

Trent Gough

Victor the Butler (uncredited)

Carol Morley

(uncredited)

Cindy Rubenfine

Dodi Heinrich (uncredited)

Ellen Stretton

(uncredited)