Prince Charles, Prince of Wales meets Mark Hadlow who plays Dori in the new 'Hobbit' film at Weta Workshop on November 14, 2012 in Wellington, New Zealand.

Prince Charles meets actor Peter Hambleton, who is dressed as Gloin the dwarf, during a visit to the makeup department of film maker Peter Jackson's Weta Workshop in Wellington November 14, 2012.

U.S. President Barack Obama reviews an honor guard with Prince Philip, Duke of Edinburgh at Buckingham Palace on May 24.

U.S. President Barack Obama and first lady Michelle Obama meet with Britain's Prince William and the Duchess of Cambridge at Buckingham Palace in London on May 24.

U.S. President Barack Obama shakes hands with Queen Elizabeth II as first lady Michelle Obama and Prince Philip, Duke of Edinburgh, look on, at Buckingham Palace in London on May 24.

Britain's Prince Charles and Camilla, Duchess of Cornwall react as their car is attacked, in London, Thursday, Dec. 9. Angry protesters in London have attacked a car containing Prince Charles, the heir to the British throne, and his wife Camilla, Duchess of Cornwall. An Associated Press photographer saw demonstrators kick the car in Regent Street, in the heart of London's shopping district. The car then sped off. Charles' office, Clarence House, confirmed that "their royal highnesses' car was attacked by protesters on the way to their engagement at the London Palladium this evening, but their royal highnesses are unharmed."

General view of broken window and thrown paint damage to Prince Charles and Camilla, Duchess of Cornwall's car which occurred en route to the Royal Veriety Performace at the Palladium on December 9 in London, England.

General view of broken window and thrown paint damage to Prince Charles and Camilla, Duchess of Cornwall's car which occurred en route to the Royal Veriety Performace at the Palladium on December 9 in London, England.