- Charles Bronson
- Scott Wardman
- Orson Bean
- Hal Wardman
- Honor Blackman
- Mummy
- Michael Craig
- Daddy
- Paul Ford
- Mr. Wardman - Scott's Father
- Jack Hawkins
- Judge Millington-Draper
- Trevor Howard
- Lola's Grandfather
- Lionel Jeffries
- Solicitor Mr Creighton
- Kay Medford
- Mrs. Wardman - Scott's Mother
- Robert Morley
- Judge Roxborough
- Susan George
- Twinky
- Peggy Aitchison
- Nice Mrs. Finchley
- Tony Arpino
- Mean New York Judge
- Eric Barker
- Tight Scottish Clerk
- Erik Chitty
- Lawyer's Elderly Client
- Sheila D'Union
- Naive English School Chum
- Judith Furse
- School Miss-tress
- Marcia Garton
- Rich English School Chum
- Cathy Jose
- Felicity - English School Chum
- Anthony Kemp
- Peter - Brat Brother
- Sue Lloyd
- Ursula - Scott's Deprived Girl
- Barney Martin
- Doorman - Efficient but Fat
- Ruth Masters
- Hal's Candy Store Secretary
- Nina Monique
- Pushy English School Chum
- Annette Montgomery
- Grandpa's Lucky Au-Pair
- Mark Robbins
- Flustered Mail Man
- Leslie Schofield
- Very English Police Sergeant
- Anne Sheward
- Sexy English School Chum
- Debbie Slater
- Lucky Grandpa's Au-Pair!!
- Jack Somack
- N.Y. Landlord -Loser!!
- Derek Steen
- Constable - Likes Books
- Jimmy Tarbuck
- Norman Vaughan!!!
- Norman Vaughan
- Jimmy Tarbuck!!!
- Gordon Waller
- Marty - the Hippie
- Ann Way
- School Miss-tress
- Stephanie White
- Eating English School Chum
- Polly Williams
- Twinky's Pretty Sister
- Doy Young
- Leggy English School Chum
- Melanie Marlene-Ilysa
- 3 Pretty N.Y. School Friends
- Jack Armstrong
- Barrister
- Mel Churcher
- (uncredited)
- Victor Harrington
- Barrister
- Jill Ireland
- Girl at Airport
- Gerry Judge
- Barrister
- Reg Lever
- Old Gentleman
- Elspeth March
- Secretary
