Michael York

D'Artagnan

Oliver Reed

Athos

Richard Chamberlain

Aramis

Frank Finlay

Porthos

Faye Dunaway

Milady de Winter

Christopher Lee

Rochefort

Raquel Welch

Constance de Bonancieux

Geraldine Chaplin

Queen Anne of Austria

Charlton Heston

Cardinal Richelieu

Roy Kinnear

Planchet

Simon Ward

Duke of Buckingham

Jean-Pierre Cassel

Louis XIII

Michael Gothard

Felton

Nicole Calfan

Maid Kitty

Ángel del Pozo

Jussac

Eduardo Fajardo

Officer

Sybil Danning

Eugenie

Jack Watson

Busigny

Bob Todd

Firing Squad Officer

Norman Chappell

Submarine Inventor

Leon Greene

Swiss Officer

Lucy Tiller

Mother Superior

Joss Ackland

D'Artagnan's Father (archive footage) (uncredited)

Gretchen Franklin

D'Artagnan's Mother (archive footage) (uncredited)

Richard Briers

Louis XIII (voice) (uncredited)

John Bluthal

English Officer/Innkeeper and other roles (voice) (uncredited)