Yet another milestone for Princess Lilibet was missed by her uncle, Prince William, when she joined her parents in the United Kingdom to celebrate Queen Elizabeth II's Platinum Jubilee. The timing of the milestone celebration overlapped with Lili's first birthday, and — like any parents would — Prince Harry and Meghan Markle hosted a birthday party to mark her first full trip around the sun. 

As expected, Harry and Meghan invited members of the royal family to attend their little girl's big day, including William, Princess Catherine, Prince Edward, and Sophie, Duchess of Edinburgh, but none attended. In fact, they were all in different parts of Great Britain to continue commemorating the queen, and a source told Entertainment Tonight at the time that there was no ill will despite the optics. "It's simply a coincidence they fell on the same day," the source said of Lili's birthday party and William's absence. "There was no intended slight."

However, royal watchers were quick to point out that in a joint appearance that soon followed, Harry and Meghan were seated far away from William and Catherine, and instead joined Princess Eugenie and Princess Beatrice at the Platinum Jubilee event. Did William give Lili the cold shoulder? Given the ongoing tension, it's difficult to interpret it as anything other than a snub.