William and Kate share unseen wedding photo to mark 13th wedding anniversary

The Prince and Princess of Wales marked their 13th wedding anniversary on Monday by releasing an unseen portrait from their big day, which shows for the first time William’s secret change of uniform.

The picture captures the couple in the Bow Room at Buckingham Palace and was one of a series of non-official images taken by Millie Pilkington for their own personal use.

Kate had remained until the evening in her white lace dress but William did a quick change out of the red ceremonial Irish Guards tunic which Queen Elizabeth had insisted on.

Instead he wore a new Irish Guards uniform of gold and black, a glimpse of which was seen when he drove his bride away in his father’s Aston Martin but has never been fully viewed until now.

The picture was captioned: ‘13 years ago today!’

In a recent trend for the Royals, the typically private family shared a glowing photo of fan favourite Prince Louis to celebrate his sixth birthday.

Donning a collared button-up shirt as he lay carefree along a picnic rug, the aging darling often appears comfortable in the spotlight.

The cheeky prince has often drawn interest from onlookers for his toddler tantrums, playful antics and “Boss Baby” moniker to keen followers.

While Louis was the centre of attention last week, it was his mother and photographer Kate who had been at the centre of controversy in recent months for her camera skills.

A botched Mother’s Day photograph shared with the public in early March sparked furore when royal sleuths deemed it to be photoshopped.

Admitting to the blunder and subsequently apologising, Kate has since abstained from honing her editing skills in the public eye.

The 42-year-old mother of three is continuing her recovery from major abdominal surgery in January.

She is undergoing preventative chemotherapy for the cancer that doctors subsequently discovered and is on leave from public royal duties.