The Princess of Wales was at the Garter Day Service at St. George’s Chapel, Windsor Castle, an event she missed last year due to her cancer treatment

This year, the royal family put on quite a show. Between Kate Middleton’s electric blue Catherine Walker coatdress, Prince William on horseback and Princess Charlotte’s nod to the late Queen Elizabeth II,

The shared Instagram account for Kate Middleton and Prince William welcomed a trio of guest posters Sunday, when children Prince George, Princess Charlotte, and Prince Louis took the platform over. The occasion: Father's Day, with a post in tribute to their dad, the Prince of Wales.