Kate “looked so happy,” an observer told PEOPLE on Oct. 25, 2010, when they joined friends at the wedding of the prince's old ...

Princess Kate and Prince William have been married since April 29, 2011, and have since welcomed three children ...

A longtime royals expert revealed that Kate Middleton and Prince William kept a major milestone in their relationship a secret back in 2010. 15 years ago, Kate and William attended a friend's wedding, ...

Kate Middleton and Prince William had a special reunion at Windsor Castle with another future king and queen. Crown Prince Hussein and Princess Rajwa of Jordan visited with the Prince and Princess of ...

We probably won't see the Duke and Duchess of Sussex at Taylor Swift and Travis Kelce's wedding, but Harry's estranged brother might make an appearance.

William and Crown Prince Hussein also made a royal outing together during the Jordanian couple's visit to the U.K. Stephanie Petit is a Royals Editor, Writer and Reporter at PEOPLE. Andrew ...