Buckingham Palace garden party

Guests await the arrival of Queen Elizabeth II during a garden party at Buckingham Palace on May 29, 2012, in London.

Queen Elizabeth II and Prince Philip, Duke of Edinburgh, stand for the national anthem as they attend a garden party at Buckingham Palace on May 29, 2012, in London.

Kate, Duchess of Cambridge, Camilla, Duchess of Cornwall, Princess Anne and Prince Charles attend a garden party at Buckingham Palace on May 29, 2012, in London.

Kate, Duchess of Cambridge, left, and Camilla, Duchess of Cornwall, attend a garden party at Buckingham Palace in London on May 29, 2012.

From top left, Prince Charles, Camilla, Duchess of Cornwall, Princess Anne, Kate, Duchess of Cambridge, Prince Edward and Sophie, Countess of Wessex, walk to meet guests at the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Britain's Queen Elizabeth II.

Kate, Duchess of Cambridge, attends the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Queen Elizabeth II.

Kate, Duchess of Cambridge, meets guests during a garden party at Buckingham Palace on May 29, 2012, in London.

Britain's Queen Elizabeth II, center, meets guests at the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark her Diamond Jubilee.

Kate, Duchess of Cambridge, center, meets guests at the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Queen Elizabeth II.

Queen Elizabeth II meets guests during a garden party at Buckingham Palace on May 29, 2012, in London.

Guests attend the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Britain's Queen Elizabeth II.

Kate, Duchess of Cambridge, center, meets guests at the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Britain's Queen Elizabeth II.

Queen Elizabeth II meets guests during a garden party at Buckingham Palace, in London on May 29, 2012.

Prince Charles meets a guest during a garden party at Buckingham Palace on May 29, 2012, in London.

Kate, Duchess of Cambridge, right, meets guests at the Buckingham Palace garden party on May 29, 2012, in London, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Britain's Queen Elizabeth II.

Prince Philip, Duke of Edinburgh, meets guests during a garden party at Buckingham Palace on May 29, 2012, in London.

Camilla, Duchess of Cornwall, front right, and Kate, Duchess of Cambridge, right, meet guests during a garden party at Buckingham Palace on May 29, 2012, in London.

Queen Elizabeth II meets guests during a garden party at Buckingham Palace on May 29, 2012, in London. (Photo by )

Britain's Queen Elizabeth II attends a garden party at Buckingham Palace, in London, May 29, 2012.

Kate, Duchess of Cambridge, meets guests during a garden party at Buckingham Palace on May 29, 2012, in London.

Kate, Duchess of Cambridge, laughs as she meets Bethan Haynes, third left, during a garden party at Buckingham Palace on May 29, 2012, in London.

Kate, Duchess of Cambridge, right, meets guests at the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Queen Elizabeth II.

Kate, Duchess of Cambridge, left, meets guests at the Buckingham Palace garden party in London on May 29, 2012, ahead of the main weekend of celebrations to mark the Diamond Jubilee of Britain's Queen Elizabeth II.