Princess Charlotte's parents, Prince William and Catherine, released a portrait of their daughter on their official Instagram account to celebrate her 11th birthday on May 2. The photo, which follows last year's birthday picture, shows Charlotte looking as grown as ever in a cozy sweater and jeans. Her parents, along with older brother George, and younger brother Louis, have also shared their daughter's birthday photos. This has been a busy year for Charlotte, with her parents sharing a video of her playing the piano together on Christmas Eve.