The pair are celebrating seven years together as his younger brother prepares to wed Meghan Markle on May 19.
Happy anniversary to Prince William and Kate Middleton!
The happy couple -- who just welcomed their third child, Louis Charles -- were married on April 29, 2011 at Westminster Abbey in London, England, in front of 1,900 people in attendance, and millions more watching from around the world.
As the world prepares for yet another royal wedding, the May 19th wedding of Prince Harry and Meghan Markle, the official Kensington Palace Twitter account on Sunday posted a short message congratulating the royal couple on seven happy years.
"Seven years ago today - thank you for all the lovely messages on The Duke and Duchess of Cambridge's wedding anniversary!" the message reads.
Seven years ago, Prince Harry served as Prince William's best man at the wedding. Prince William is set to return the favor on May 19, joking to reporters on Friday, "Revenge is sweet. I'll be looking forward to it."
Prince Harry and Markle will be getting married at St. George's Chapel in Windsor, England, with about 600 guests, possibly including several celebrities, that could include Elton John, David Beckham, the Spice Girls and Serena Williams.
A new baby, an anniversary and a wedding, all in the span of a few weeks? Royal family fans are living the best life right about now.
For more on the relationship between Middleton and Markle, watch the video below.
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