George Formby
— George Trotter
Billy Caryll
— Tiger Tubbs
Hilda Mundy
— Ma Tubbs
Gaston Palmer
— Le Grand Gaston
Jack Daly
— Terry O'Rourke
Carl Jaffe
— Hilary Vance
Marjorie Browne
— Betty Dickson
Wally Patch
— Det Sgt. Carp
Ian Fleming
— Chief Inspr. Twyning
Vincent Holman
— Erasmus Montague
Dennis Wyndham
— Tom Driscoll
Gordon McLeod
— Supt. Belstock
Merle Tottenham
— Tessie
Georgina Cookson
— Willow Thane
Jack Raine
— J.B. Cato
Honor Boswell
— Alpha
Beryl Boswell
— Omega
Jacques Brown
— Professor Borgensen (uncredited)