Peter Glenville Director Richard Burton Thomas à Becket Actor Peter O'Toole King Henry II Actor John Gielgud King Louis VII of France Actor Gino Cervi Cardinal Zambelli Actor Paolo Stoppa Pope Alexander III Actor Donald Wolfit Bishop Folliot Actor David Weston Brother John Actor Martita Hunt Empress Matilda Actor Pamela Brown Queen Eleanor Actor Sîan Phillips Gwendolen Actor Edward Anhalt Screenwriter Hal B. Wallis Producer Joseph H. Hazen Executive Producer Geoffrey Unsworth Cinematographer Anne V. Coates Film Editing Laurence Rosenthal Original Music John Bryan Production Design Maurice Carter Art Director Robert Cartwright Set Decoration Patrick McLoughlin Set Decoration Margaret Furse Costume Design Sally Nicholl Casting