It is highly likely that Pejic and Australian singer-songwriter Gabriella Cilmi, both just turned 20, were the youngest invitees.
Also in attendance were Finch, Collette Dinnigan, Yasmin Sewell, Jason Donovan, Hugh Jackman, chef Bill Granger, who assisted the royal kitchens in the preparation of lamingtons and pavlova (iconic Australian pastries) and Elle Macpherson, who curtseyed when meeting HM (see below) and looked equally demure in a nude silk cocktail dress and matching handbag and pumps.
Not quite so demure was Australian novelist Kathy Lette, who rocked up to the event with her husband, British QC Geoffrey Robertson - both staunch Republicans - in an outfit emblazoned with pictures of corgis wearing crowns.
The Queen was resplendent in what we are reliably informed was an eggplant silk cloque tailleur by British couturier Stewart Parvin.
getty via daylife