Monte Carlo was filmed on location in Paris, France and Monte Carlo, Monaco, but many scenes of both cities were filmed in Budapest, Hungary.
The girls run through the Louvre on their quick tour.
The girls stay in the Grace Kelly suite while Grace pretends to be Cordelia in Monaco.
The girls get left behind from their tour while enjoying the view from the Eiffel Tower.
Meg meets Riley for the first time on the steps leading to the Basilica of the Sacred Heart of Paris
The climatic scene where Grace gives a speech while the necklace is being auctioned was filmed in one of the rooms at the Ervin Szabó Library