Michelle Obama is not the only first lady who has become adept at using fashion as a form of subtle sartorial outreach to foreign leaders. On Tuesday night in London at the Palace state dinner in honor of President Xi Jinping of China, Catherine, the Duchess of Cambridge (the British first lady in waiting), demonstrated her own ability to employ dress as a form of diplomacy, wearing a gown by the British designer Jenny Packham — in a bright shade of red, the Chinese national color.

When it comes to the world’s most popular royal, there is no contest. Britain’s Kate Middleton, aka the Duchess of Cambridge, is the undisputed queen, able to sell out dresses just by wearing them and sell out crowds simply by showing up and waving. But there are other royals who inspire America’s aspiring fashionistas.