Peter Sellers as Hrundi V. Bakshi

Claudine Longet as Michele Monet

Natalia Borisova as Ballerina

Jean Carson as Nanny

Marge Champion as Rosalind Dunphy

Al Checco as Bernard Stein

Corinne Cole as Janice Kane

Dick Crockett as Wells

Frances Davis as Maid

Danielle De Metz as Stella D'Angelo

Herbert Ellis as Director

Paul Ferrara as Ronnie Smith

Steve Franken as Levinson

Kathe Green as Molly Clutterbuck

Allen Jung as Cook

Sharron Kimberly as Princess Helena

James Lanphier as Harry

Buddy Lester as Davey Kane

Stephen Liss as Geoffrey Clutterbuck

Gavin MacLeod as C. S. Divot

Jerry Martin as Bradford

Fay McKenzie as Alice Clutterbuck

J. Edward McKinley as Fred Clutterbuck

Denny Miller as 'Wyoming Bill' Kelso

Elianne Nadeau as Wiggy

Thomas W. Quine as Congressman Dunphy

Carol Wayne as June Warren

Donald R. Frost as Drummer

George Winters as Cliff Hanger

Linda Gaye Scott as Starlet

Timothy Scott as Gore Pontoon

Ken Wales as Assistant Director

Helen Kleeb as Secretary

Vin Scully as Himself - baseball announcer (archive sound)

Loren Brown as Special Effects Man (uncredited)

Ralph Gambina as Crew Member (uncredited)

Jeff Lawrence as Crew Member (uncredited)

John McKee as Policeman (uncredited)