Richard Burton as Thomas Becket

Peter O'Toole as King Henry II of England

John Gielgud as King Louis VII of France

Gino Cervi as Cardinal Zambelli

Paolo Stoppa as Pope Alexander III

Donald Wolfit as Bishop Folliot

David Weston as Brother John

Martita Hunt as Empress Matilda

Pamela Brown as Queen Eleanor of Aquitaine

Percy Herbert as Baron

Siân Phillips as Gwendolen

Inigo Jackson as Robert de Beaumont

Felix Aylmer as Archbishop of Canterbury

Niall MacGinnis as Baron

Christopher Rhodes as Baron

John Phillips as Bishop of Winchester

Frank Pettingell as Bishop of York

Véronique Vendell as French Prostitute

Jennifer Hilary as Peasant's Daughter

David Davenport as

Hamilton Dyce as Bishop of Chichester

Peter Jeffrey as Baron

Michael Miller as Baron

Peter Prowse as Baron

Jack Taylor as

Chris Adcock as Sergeant (uncredited)

Michael Anthony as Courtier (uncredited)

Geoffrey Bayldon as Brother Philip (uncredited)

Garrett Cassell as Man (uncredited)

Dave Clark as Soldier (uncredited)

George Lane Cooper as Soldier (uncredited)

Ian Cullen as Servant (uncredited)

Ivor Dean as Monk (uncredited)

Guy Deghy as Man (uncredited)

John Doye as Priest (uncredited)

Paul Farrell as Farmer (uncredited)

Patrick Halpin as Monk (uncredited)

Laurie Heath as Boy (uncredited)

Laurence Hepworth as Bishop (uncredited)

Rose Howlett as Farmer's Wife (uncredited)

Magda Konopka as Girl on Balcony (uncredited)

Gerald Lawson as English Peasant (uncredited)

Wilfrid Lawson as Old Soldier (uncredited)

Paul Layton as Boy (uncredited)

Tutte Lemkow as French Courtier (uncredited)

Linda Marlowe as Farmer's Daughter (uncredited)

John Moulder-Brown as Boy (uncredited)

Patrick Newell as William of Corbeil (uncredited)

Riggs O'Hara as Prince Henry (uncredited)

Frederick Piper as Monk (uncredited)

Dido Plumb as Man in Crowd (uncredited)

Steve Plytas as Cardinal (uncredited)

Robert Rietti as Alexander III (voice) (uncredited)

Alex Scott as Priest (uncredited)

Terence Soall as Man (uncredited)

Victor Spinetti as French Tailor (uncredited)

Graham Stark as Pope's Secretary (uncredited)

Fred Stroud as Church Guard (uncredited)

Elizabeth Taylor as Blonde Village Woman (uncredited)

Royston Tickner as Royal Servant (uncredited)

Fred Wood as Congregation Member (uncredited)

Edward Woodward as Clement (uncredited)