"I think it will take time to improve myself," Monaco's princess-to-be says
The couple will marry next month in the courtyard of the Palace in Monaco
Raised a Protestant, Charlene Wittstock adopts Monaco's official religion
Prince Albert and Charlene Wittstock are set to wed this summer
Monaco's monarch and Charlene Wittstock will now marry July 2 and 3, 2011
July 8 and 9, 2011, will see the couple tie the knot in two ceremonies
"Everyone here is extremely, extremely happy," the palace tells PEOPLE, confirming the engagement to Charlene Wittstock
The star joins Prince Albert and U2's The Edge for the rocker's big day
Pope Benedict XVI has revealed he prayed to God during the conclave not to be elected pope but that "evidently this time He didn't listen to me."