She's the royal family's "super trouper", according to the Prince and Princess of Wales – and, along with the King , the hardest-working member of the Firm by quite a distance.

But as Princess Anne turns 75 in typically low-key fashion this week, she shows no signs of slowing down. A new image released before her birthday on 15 August shows the King’s sister with her husband, Vice Admiral Sir Timothy Laurence, at a state banquet at Windsor Castle last month.

Taken as the couple arrived for duty, it shows the Princess – who was HELLO! 's original cover girl when the magazine launched in 1988 – looking timelessly elegant in a white evening dress and bolero jacket, teamed with a dazzling diamond necklace and the Festoon Tiara along with her royal family orders, the Thistle Star and

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