 Filming also took place in Chicago, Amsterdam, Paris, Monte Carlo, Lake Como (at George Clooney's Villa in Laglio), Rome and Castellammare del Golfo in Sicily.The production spent three weeks in the Netherlands; scenes were filmed in the KattenKabinet, the Hotel Pulitzer, Haarlem railway station, and The Hague City Hall.In Paris, scenes were shot at the Sorbonne, the Australian Embassy, and the Gare du Nord.