Though his stock was dwindling slightly, Kenneth still ranked as the third and fourth most popular international star (in 1961 and 1962 respectively).
The latter of these years saw the actor return to television. Heart to Heart - written by the aforementioned Sir Terrence Rattigan - marked that comeback, with his performance as journalist David Mann the subject of sizeable acclaim.
Though riveted by his return to television, Kenneth was delighted to have a small cameo in The Longest Day - a film about the D-Day landings - the next year.
His final leading film role came in 1964, where Kenneth gave a masterful performance in the adaptation of Douglas Hayes' novel The Comedy Man.