Princess Charlotte of Wales attends Christmas Day service at St Mary Magdalene Church on Dec. 25, 2023 in Sandringham, Norfolk. (Mark Cuthbert/UK Press via Getty Images)(LONDON) Princess Charlotte, the second child of Prince William and Kate, the princess of Wales, is celebrating her 9th birthday.Charlotte was born May 2, 2015. The young royal made her public debut just hours after her birth at St. Mary s Hospital in London.Her full name, Charlotte Elizabeth Diana, is a tribute to her late great-grandmother Queen Elizabeth II and late grandmother Princess Diana.She is the only daughter of William and Kate, who also have two sons, Princes George, 10, and Louis, who turned 6 last week.Charlotte is expected to spend her 9th birthday privately with her family in Windsor, where they now live.In an interview several months after Charlotte s birth, Kate spoke about how excited family members, including the late queen, were to have a girl join the family."The queen was really thrilled t