Kate and William don't often engage in public shows of affection (unlike their newlywed counterpart Meghan and Harry), so it's nice to see them sharing an intimate moment in the very place their royal love story began.
Two outfits in one day!
Earlier on Tuesday, the pair attended a service at Westminster Abbey to mark the centenary for the Royal Air Force (RAF), which included a flypast of around 100 aircraft. As the camera pans out, it looks like the Prince is explaining what's so amusing to his wife, the answer to which appears to bring a smile to Kate's lips as well. On Wednesday, they are expected to visit a Gaelic sports festival at Croke Park before taking a tour of the famous Trinity College.
According to Kensington Palace, "They are looking forward to learning more about Ireland's history and experiencing its rich culture, as well as meeting the people who are shaping the country's future".