Acting legend Sir Mark Rylance says Harry Styles is a "great lad" praising his professionalism on the set of 'Dunkirk'.
The stars of Christopher Nolan's WW2 thriller 'Dunkirk' were out in force in London's Leicester Square.
Remember this day: May 23, the day Harry Styles went to war. In other words, principal photography is now under way for World War II drama. One Direction member (and his newly shorn hair) are not seen in these new images.