The British Royal Family Attends The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Britain's Catherine, Duchess of Cambridge, (L) and Britain's Prince Harry arrive to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016.

Britain's Prince William, Duke of Cambridge (L), his wife Britain's Catherine, Duchess of Cambridge (C), and Britain's Prince Harry arrive to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016.

Britain's Prince William, Duke of Cambridge (L), his wife Britain's Catherine, Duchess of Cambridge, arrive to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016. 

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Britain's Queen Elizabeth II arrives to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016. Queen Elizabeth II has been Head of the Commonwealth throughout her 60 year reign. Organised by the Royal Commonwealth Society, the Service is the largest annual inter-faith gathering in the United Kingdom.

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. The service is the largest annual inter-faith gathering in the United Kingdom and will celebrate the Queen's 90th birthday. Kofi Annan and Ellie Goulding will take part in the service. 

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

(L-R) Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

(L-R) Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

(L-R) Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. The service is the largest annual inter-faith gathering in the United Kingdom and will celebrate the Queen's 90th birthday. Kofi Annan and Ellie Goulding will take part in the service.

(L-R) Catherine, Duchess of Cambridge and Prince Harry attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Britain's Queen Elizabeth II arrives to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016. Queen Elizabeth II has been Head of the Commonwealth throughout her 60 year reign. Organised by the Royal Commonwealth Society, the Service is the largest annual inter-faith gathering in the United Kingdom.

Britain's Prince Philip, Duke of Edinburgh arrives to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016. 

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. The service is the largest annual inter-faith gathering in the United Kingdom and will celebrate the Queen's 90th birthday. Kofi Annan and Ellie Goulding will take part in the service. 

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. The service is the largest annual inter-faith gathering in the United Kingdom and will celebrate the Queen's 90th birthday. Kofi Annan and Ellie Goulding will take part in the service.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Henry attend The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Henry attend The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Queen Elizabeth II attends The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. The service is the largest annual inter-faith gathering in the United Kingdom and will celebrate the Queen's 90th birthday. Kofi Annan and Ellie Goulding will take part in the service.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Britain's Catherine, Duchess of Cambridge, (L) and Britain's Prince Harry arrive to attend a Commonwealth Service at Westminster Abbey in central London on March 14, 2016.

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince Andrew, Duke of York attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Catherine, Duchess of Cambridge and Prince Harry attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

 Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK

Queen Elizabeth II is greeted by Rev John Hall, Dean of Westminster as she arrives at the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince Harry and Prince Andrew, Duke of York attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge, Prince Harry and Prince Andrew, Duke of York attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK.

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry arrive to attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. 

Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry arrive at the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Queen Elizabeth II and Prince Philip, Duke of Edinburgh arrive at the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Queen Elizabeth II and Prince Philip, Duke of Edinburgh arrive at the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. 

Queen Elizabeth II smiles as she arrives at the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge smile at each other as they attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK

Prince Andrew, Duke of York arrives to attend The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince William, Duke of Cambridge and Prince Harry arrive to attend The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Prince Andrew, Duke of York arrives to attend The Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Prince Harry and Catherine, Duchess of Cambridge leave the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. 

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge leave the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Britain's Prince Philip, Duke of Edinburgh, is pictured as he leaves Westminster Abbey in central London, after attending a Commonwealth Service on March 14, 2016.

Britain's Prince Harry is pictured as he leaves Westminster Abbey in central London, after attending a Commonwealth Service on March 14, 2016.

Britain's Queen Elizabeth II (Foreground) leads other members of the royal family in Westminster Abbey in central London, on March 14, 2016, as they attend a Commonwealth Service. Queen Elizabeth II has been Head of the Commonwealth throughout her 60 year reign. Organised by the Royal Commonwealth Society, the Service is the largest annual inter-faith gathering in the United Kingdom.

Britain's Queen Elizabeth II (Below L) and her husband Prince Philip, Duke of Edinburgh,(Below R) are pictured with other members of the royal family in Westminster Abbey in central London, on March 14, 2016, as they attend a Commonwealth Service. Queen Elizabeth II has been Head of the Commonwealth throughout her 60 year reign. Organised by the Royal Commonwealth Society, the Service is the largest annual inter-faith gathering in the United Kingdom



Prince Harry attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Britain's Queen Elizabeth II (C) and her husband Prince Philip, Duke of Edinburgh, are pictured with other members of the royal family in Westminster Abbey in central London, on March 14, 2016, as they attend a Commonwealth Service. 

Prince Harry and Prince William, Duke of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Prince Harry attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Prince Harry, Cathereine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. 

Prince Philip, Duke of Edinburgh, Catherine, Duchess of Cambridge and Prince Harry attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK.

Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK.

Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK

Queen Elizabeth II, Prince Philip, Duke of Edinburgh, Prince William, Duke of Cambridge, Catherine, Duchess of Cambridge and Prince Harry attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London.

Prince Harry meets pupils from from St Matthews State school before attending a Commonwealth Day service at Westminster Abbey on March 14, 2016 in London, United Kingdom.

Prince William, Duke of Cambridge meets pupils from from St Matthews State school before attending a Commonwealth Day service at Westminster Abbey on March 14, 2016 in London, United Kingdom. The service is the largest annual inter-faith gathering in the UK.

Britain's Queen Elizabeth II is pictured as she attends a Commonwealth Service in Westminster Abbey in central London, on March 14, 2016. Queen Elizabeth II has been Head of the Commonwealth throughout her 60 year reign.

Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. 

Prince Harry and Catherine, Duchess of Cambridge leave the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. 

Queen Elizabeth II smiles as she leaves the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. The service is the largest annual inter-faith gathering in the UK.

Prince Harry, Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the annual Commonwealth Day service on Commonwealth Day on March 14, 2016 in Westminster Abbey, London. 

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince Harry and Prince William, Duke of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Prince Harry attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince Harry departs the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince William, Duke of Cambridge talks with choir boys as he attends the Commonwealth Observance Day Service at Westminster Abbey on March 14, 2016 in London, England. 

Prince Andrew, Duke of York attends the Commonwealth Observance Day Service at Westminster Abbey on March 14, 2016 in London, England.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom. 

Queen Elizabeth II attends the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.

Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the Commonwealth Observance Day Service on March 14, 2016 in London, United Kingdom.