Peter Sellers
— Wilfred Morgenhall
Richard Attenborough
— Herbert Fowle
Beryl Reid
— Doris Fowle
David Lodge
— Frank Bateson
Frank Pettingell
— Tuppy Morgan
Audrey Nicholson
— Morgenhall's Girl
Tristram Jellinek
— Mr. Perkins
Eric Woodburn
— Judge Banter
John Waite
— Clerk of the Court
Frank Williams
— Barrister
Eric Dodson
— Examiner