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LONDON, ENGLAND - FEBRUARY 27: Catherine, Duchess of Cambridge greets guests at a reception this evening to mark the launch of the UK-India Year of Culture 2017 on February 27, 2017 in London, England. (Photo by Jonathan Brady - WPA Pool/Getty Images)

LONDON, ENGLAND - FEBRUARY 27:  Catherine, Duchess of Cambridge greets guests at a reception this evening to mark the launch of the UK-India Year of Culture 2017 on February 27, 2017 in London, England.  (Photo by Jonathan Brady - WPA Pool/Getty Images)

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Britain's Prince William, Duke of Cambridge, (C) and Britain's Catherine, Duchess of Cambridge, attend a reception to mark the launch of the UK-India Year of Culture 2017 at Buckingham Palace in London on February 27, 2017. / AFP / POOL / Yui Mok (Photo credit should read YUI MOK/AFP/Getty Images)

Britain's Prince William, Duke of Cambridge, (C) and Britain's Catherine, Duchess of Cambridge, attend a reception to mark the launch of the UK-India Year of Culture 2017 at Buckingham Palace in London on February 27, 2017.  / AFP / POOL / Yui Mok        (Photo credit should read YUI MOK/AFP/Getty Images)

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Britain's Catherine, Duchess of Cambridge, (L) attends a reception to mark the launch of the UK-India Year of Culture 2017 at Buckingham Palace in London on February 27, 2017. / AFP / POOL / Yui Mok (Photo credit should read YUI MOK/AFP/Getty Images)

Britain's Catherine, Duchess of Cambridge, (L) attends a reception to mark the launch of the UK-India Year of Culture 2017 at Buckingham Palace in London on February 27, 2017.  / AFP / POOL / Yui Mok        (Photo credit should read YUI MOK/AFP/Getty Images)