Only seventeen of Australia’s thirty prime ministers to date are represented in the National Portrait Gallery’s collection. Their portraits have been acquired in random order, mostly according to unexpected opportunity. This is the first time in the Gallery’s 20-year history that the esteemed prime ministers’ portraits have been shown as a group. The contrasting sizes, moods and mediums of these portraits, and the different ways they have become available, reflect the exhilarating variety across the collection as a whole.