Kate, William and Harry kick-off Queen's 90th birthday celebration

Prince William, Catherine, Duchess of Cambridge, and Prince Harry arrive to attend the Commonwealth Service at Westminster Abbey in London. (Reuters)

Catherine, Duchess of Cambridge, arrives to attend the Commonwealth Service at Westminster Abbey in London, Britain. (Reuters)

Prince William and Catherine, Duchess of Cambridge. (Reuters)

(Reuters)

Prince William his wife, Catherine, Duchess of Cambridge and Prince Harry, leave after attending the Commonwealth Service at Westminster Abbey. (Reuters)

Prince Harry, Catherine, Duchess of Cambridge, and Prince William (L-R) attend the Commonwealth Service at Westminster Abbey in London. (Reuters)

Catherine, Duchess of Cambridge, attends the Commonwealth Service at Westminster Abbey. (Reuters)

(Reuters)

Kate, the Duchess of Cambridge leaves after attending the Commonwealth Day service at Westminster Abbey in London. (AP)

Britain's Queen Elizabeth II, Philip, the Duke of Edinburgh, Prince William, Kate, the Duchess of Cambridge, Prince Harry and Prince Harry, during the Commonwealth Day service at Westminster Abbey in London. (AP)

(AP)

Follow Emirates 24|7 on Google News.