Tyrannical King Louis XIV learns that he has an identical twin brother, Philippe, who was raised from birth by his late father's trusted friend D'Artagnan and his faithful musketeers, Porthos, Athos and Aramis. After Philippe falls for the king's betrothed, Spanish Princess Maria Theresa, Louis imprisons him, forcing his brother to don an iron mask that will slowly suffocate him -- and it's up to D'Artagnan to rescue him.
Louis Hayward
Joan Bennett
Warren William
Joseph Schildkraut
Alan Hale
Walter Kingsford
Miles Mander
Bert Roach
Marion Martin
Montagu Love
Doris Kenyon
Albert Dekker
Nigel De Brulier
William Royle
Boyd Irwin
Howard Brooks
Reginald Barlow
Lane Chandler
Wyndham Standing
Dorothy Vaughan
Sheila Darcy
Robert Milasch
D'Arcy Corrigan
Harry Woods
Peter Cushing
Emmett King
Ted Billings
Fred Cavens
James Dime
Dwight Frye
Leyland Hodgson
Ian Maclaren
John Merton
Edgar Norton
William H. O'Brien
Artie Ortego
Herman Hack