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

Tudor Owen

Simon

Melville Cooper

Henry Wynch

Alan Mowbray

Sir Gilbert Talbot

Rhys Williams

Turnkey

Joan Elan

Charity Fell

Charles Davis

Apothecary

Ian Wolfe

Fell

Paul Cavanagh

Sir Edward Scott

Lillian Kemble-Cooper

Mrs. Fell

Isobel Elsom

Mrs. Bennett

Milton Parsons

Adam Urich

Queenie Leonard

Apothecary's Wife

Robert Dix

Husky

Jimmy Aubrey

Little Man (uncredited)

Leonard Carey

Servant (uncredited)

Peter Hansen

Sir Isaac Newton (uncredited)

Matt Moore

Gentleman (uncredited)

Gordon Richards

Courier (uncredited)

Lewis L. Russell

Gentleman (uncredited)