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

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

Belinda Lee

Amanda

Tommy Duggan

Joe

Jerry Verno

Alf - the Bookmaker

Jack Doyle

Assistant Trainer

Arthur Mullard

Henchman (uncredited)

Carol White

Schoolgirl (uncredited)

Barbara Windsor

Schoolgirl (uncredited)