The Prince and Princess of Wales shared a never-seen before wedding portrait to mark their 13th anniversary on Monday.
The black and white shot, taken by photographer Millie Pilkington and shared on their social media channels, shows the newlyweds at Buckingham Palace after their fairytale nuptials.
Prince William, wearing his red Irish Guards uniform, is seen with his arm around his bride's waist, as the happy couple beam at the camera.
Kate looks the perfect blushing bride in her satin and lace wedding gown, designed by Sarah Burton for Alexander McQueen.
She was loaned the glittering Cartier Halo tiara from the late Queen Elizabeth II for her wedding day – marking her first of many tiara moments for the future Princess of Wales.
William and Kate, who are spending their anniversary privately, wrote in the caption: "13 years ago today!"
Since their wedding at Westminster Abbey on 29 April 2011, the pair have welcomed three children – Prince George, ten, Princess Charlotte, who turns nine on 2 May, and six-year-old Prince Louis.
The occasion comes at a difficult time for the couple amid Kate's ongoing chemotherapy following a cancer diagnosis. The Prince is currently on a reduced schedule from royal duties to support his wife and their three children.
William and Kate's royal wedding
Royal fans were delighted when William finally popped the question to his university girlfriend, Kate Middleton, while on holiday in Kenya in 2010.
Just a few weeks later, the beaming couple appeared in front of the media for their engagement photocall, with the future royal bride wearing a deep blue Issa dress to match her sapphire and diamond ring, which once belonged to Diana, Princess of Wales.
William introduced his bride to her pending life as a working royal as Kate joined the Prince on a few royal engagements in the lead-up to their royal wedding, including an outing in Anglesey, where they would later spend their early years as a married couple.
The designer of Kate's wedding dress was kept a secret up until the moment she arrived at Westminster Abbey with her father, Michael Middleton, with the bride greeted by a roar of cheers and applause from the waiting crowds.
Kate's sister, Pippa Middleton, supported her big sister on her wedding day in her role as maid of honour, while Prince Harry was one of William's best men.
More than 25 million people across the UK tuned in to watch the couple exchange vows, with the day declared a Bank Holiday as the public gathered for street parties.
William and Kate were made the Duke and Duchess of Cambridge by Queen Elizabeth II on their wedding day and gifted their country home, Anmer Hall, near Sandringham.
Following the ceremony, the newlyweds rode in a carriage procession back to Buckingham Palace, where they appeared on the balcony to greet the well-wishers lining The Mall in their thousands.
The public were treated by not one, but two kisses from a beaming William and Kate, while one of their bridesmaids, three-year-old Grace van Cutsem covered her ears from the noise.
William then drove his bride from Buckingham Palace to Clarence House in his father Charles's Aston Martin DB6 Volante, which had a customised number plate "JUST WED" added to the back of the car. Watch the moment again in the clip below...
An evening reception took place for close friends and family at Buckingham Palace later that evening, with Kate changing into a satin strapless gown by Sarah Burton with a shrug.
Pop star singer Ellie Goulding performed at the couple's evening reception, singing her version of Elton John's Your Song for William and Kate's first dance.