Argentina has denounced the assignment of Prince Williams to the Falkland Islands.
Prince William has told his grandmother, the Queen that he wants to stay as Royal Air Force (RAF) pilot beyond 2013 when he is due to leave, it was reported.
Prince William will inherit the duchy, along with the title the Duke of Cornwall, when his father, Prince Charles, becomes king.
Prince Williams is ahead of his grandmother in a poll as the most trusted royal in the family.
Prince William and Kate Middleton, now the Duchess of Cambridge, have been married at Westminster Abbey in London.
The Queen is hosting an event for British and foreign royals on Thursday night, April 28.