The children of British heir Prince William and Princess Kate of Wales shared a message and photos in celebration of Father's Day today, saying, "We love you, Dad." The photo shows the three children—Prince George (10 years old), Princess Charlotte (9 years old), and Prince Louis (6 years old)—hugging their father, Prince William, on a beach. The picture was taken from behind, with all of them looking at the sea. A caption on the photo, credited to Princess Kate, reads: "We love you, Dad. Happy Father's Day," followed by two red hearts and the initials of the three children. The photo was shared a day after Princess Kate appeared publicly for the first time since revealing she underwent treatment for cancer in December. William, Kate, and their children joined King Charles and other members of the royal family on the balcony of Buckingham Palace after watching a military display in celebration of the King's official birthday.