This morning, Prime Minister Matteo Renzi arrived for the grand ceremony on the white house lawn.
A lot of the details are under wraps, but celebrity Chef Mario Battali is in charge of tonight's dinner.
Michelle Obama personally approved all three courses. The main course includes beef braciole pinwheel with horse-radish gremolata. It will be served with a 2014 zinfandel made by Cupertino's Ridge Vineyards. For dessert, green apple crostata with thyme caramel and buttermilk gelato.