Kenneth More
— Tony Kent
Shelagh Fraser
— Mary Kent
Mandy Miller
— Anne Kent
Gary Billings
— Peter Kent
Fusty Bentine
— Fusty Kent
Ronald Squire
— Grampy
Olga Lindo
— Aunt Maud
Anita Sharp-Bolster
— Mrs. Buttons
Lionel Murton
— Harry
Jan Miller
— Sue
Nora Nicholson
— Miss Pettigrew
Michael Bentine
— The Professor
Pauline Drewett
— Child at Party
Mary Laura Wood
— Jacqueline
Caroline John
— Child at Party