"10 years 👰♀️🤵♂," one photo of the two was captioned.
The royal couple held hands in the first picture as they posed on a tree branch outside. Middleton donned a blue patterned wrap dress and her sapphire engagement ring while William wore a blue sweater over a button-up shirt.
The Duke and Duchess of Cambridge shared a photo of them embracing ahead of the milestone in the second picture, which is reminiscent of their 2010 engagement photo. "Taken this week ahead of The Duke and Duchess’ 10th wedding anniversary," the photo, taken by Chris Floyd, was captioned.
"Happy Anniversary! I remember it like it was yesterday, waking up in the middle of the night here in America to watch it before heading to my first college class of the day. Congratulations!!" one user gushed in the comments.
"So beautiful! Such a gorgeous couple," another user wrote, while a third said: "So beautiful! Happy tenth wedding anniversary 💙 I still remember viewing the ceremony on TV from home in Australia. Enjoy your celebrations 🎉."
The pair tied the knot in Westminster Abbey in London on April 29, 2011, in front of 1,900 guests. The ceremony was broadcast around the world to approximately 17.6 million viewers, Hello! reported.
Their love story began in 2001 when they met at the University of St. Andrews when Kate came to the rescue while another girl was hitting on William at a party. The future Queen consort wrapped her arms around the Prince, which prompted William to tell the girl he was in a relationship and the pair ran off giggling, OK! previously reported.
Their first couple of years as a married couple were spent in North Wales while William was a search and rescue pilot in the RAF. William and Middleton currently reside in a 20-room apartment in Kensington Palace and act as full working royals.
Last week, the couple celebrated youngest son Louis' birthday on April 23.
"Taken earlier this week by The Duchess before he left for his first day of nursery, The Duke and Duchess are pleased to share a new image of Prince Louis," the couple captioned a photo of the young prince on a bicycle, which was taken by Middleton.
Meanwhile, Princess Charlotte will turn six on May 2.