As Belas de St. Trinian

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