Lord Henry Mayley

Terry-Thomas

"Wee" Sonny MacGregor

Peter Sellers

Flora Ransom

Peggy Mount

Melissa Right

Shirley Eaton

Michael Dennis

Dennis Price

Lady Lucy Mayley

Georgina Cookson

Ethel Ransom

Joan Sims

Rev. Bastable

Miles Malleson

Mactavish

Moultrie Kelsall

Police Inspector

John Stuart

Porter

Kenneth Griffith

Bill Murphy

Bill Edwards

Paunchy old man

Wally Patch

Gunsmith

Henry Hewitt

Photographer (uncredited)

George Benson

Sgt. Rumbold

Wilfrid Lawson

Bill

Billy Edwards

PC Johnson

David Lodge

1st Irishman (uncredited)

Jerold Wells

Authoress

Joan Hurley

TV announcer

Peter Noble

Dr Harz

Victor Rietti

Chemist (uncredited)

Ronald Adam

John Vernon

Police Officer (uncredited)

Tom Gill

Marianne Stone

Dinner Guest (uncredited)

Muriel Greenslade

Chinese Man in Pub (uncredited)

Andy Ho

2nd Irishman (uncredited)

Barry Keegan

Man Who Lets Out Police Car's Tyre (uncredited)

Kenneth Kove

Scientist (uncredited)

Arnold Marlé

Lady in Autograph Crowd (uncredited)

Edie Martin

Old Man in T.V. Show Audience (uncredited)

Gibb McLaughlin

Lady on Phone (uncredited)

Marjorie Rhodes

J.E. Freeman - Greengrocer (uncredited)

Michael Ripper

Pub Landlord (uncredited)

Raymond Rollett

Minister with Heart Attack (uncredited)

Austin Trevor

Dinner Guest (uncredited)

Esme Smythe