Ann Blyth

Lady Mary

Edmund Purdom

Michael Dermott

David Niven

James - Duke of Brampton

George Sanders

King Charles II

Roger Moore

Jack

John Dehner

Captain Herrick

Sean McClory

Sheldon

Melville Cooper

Henry Wynch

Alan Mowbray

Sir Gilbert Talbot

Rhys Williams

Turnkey

Ian Wolfe

Fell

Paul Cavanagh

Sir Edward Scott

Isobel Elsom

Mrs. Bennett

Milton Parsons

Adam Urich

Queenie Leonard

Apothecary's Wife

Leonard Carey

Servant (uncredited)

Leslie Denison

Beadle (voice) (uncredited)

Peter Hansen

Sir Isaac Newton (uncredited)

Keith McConnell

Usher (uncredited)

Matt Moore

Gentleman (uncredited)

Gordon Richards

Courier (uncredited)

Gilchrist Stuart

Clerk (uncredited)