Alastair Sim
Millicent Fritton / Clarence Fritton
Joyce Grenfell
P.W. Sgt. Ruby Gates
George Cole
Flash Harry
Hermione Baddeley
Miss Drownder
Betty Ann Davies
Miss Waters
Renée Houston
Miss Brimmer
Beryl Reid
Miss Wilson
Irene Handl
Miss Gale
Mary Merrall
Miss Buckland
Joan Sims
Miss Dawn
Balbina
Mlle de St. Emilion
Jane Henderson
Miss Holland
Diana Day
Jackie
Jill Braidwood
Florrie
Annabelle Covey
Maudie
Pauline Drewett
Celia
Jean Langston
Rosie
Lloyd Lamble
Superintendent Kemp Bird
Richard Wattis
Manton Bassett
Guy Middleton
Eric Rowbottom-Smith
Arthur Howard
Wilfred Woodley
Michael Ripper
Albert Faning
Eric Pohlmann
The Sultan of Makyad
Sid James
Benny
Martin Walker
Hankinson
Noel Hood
Bilston School Mistress
Vivienne Martin
Arabella
Elizabeth Griffiths
Gladys
Andrée Melly
Lucretia
Belinda Lee
Amanda
Michael Kelly
Bill
Tommy Duggan
Joe
Paul Connell
Sam
Lorna Henderson
Fatima
Vivien Wood
Miss Anderson
Cara Stevens
Sultan's Secretary
Jerry Verno
Alf - the Bookmaker
Jack Doyle
Assistant Trainer
Arthur Mullard
Henchman (uncredited)
Carol White
Schoolgirl (uncredited)
Barbara Windsor
Schoolgirl (uncredited)