Britain's Queen Elizabeth II in a military wardrobe. [Photo/Agencies]

The largest ever exhibition of the Queen's wardrobe, Fashioning a Reign: 90 Years of Style from The Queen's Wardrobe will bring together childhood fancy dress costumes, military regalia and glamorous ceremonial dresses.

The three displays will each have a distinct theme. The fancy dress costumes worn by the young Princess Elizabeth at wartime family pantomimes will be on show at Windsor Castle from September 2016 alongside dazzling evening gowns and smart official clothes.