Princess Diana sat Prince William down and spoke to him frankly about his future in the monarchy.Channel 5's new Royal documentary The Windsors: Inside the Royal Dynasty revealed how Diana warned William not to rush into finding a wife.Journalist Richard Kay said: "I know Diana discussed with William, she said 'whatever you do you must get to know the person you marry."'She must be your friend first and foremost."William and Kate Middleton, now the Duchess of Cambridge, were together for over seven years before he asked her to marry him and ultimately become Queen consort of the United Kingdom.Speaking in their engagement interview Kate said the time together prior to willing asking her to marry him allowed them to grow closer.Kate said: "I.
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