Prince William is taking a moment to wish his father, King Charles, a very happy birthday on social media.
Just a few hours ago, the Prince of Wales, 41, posted a celebratory slideshow on the official Instagram account he shares with his wife, Kate Middleton, 41. The tribute post starts with a throwback pic of the father and son smiling on one of their ski trips. In the second photo, the king is smiling in a blue suit.