Princess Charlotte just turned 10, and Prince William and Princess Kate are celebrating their daughter with a new photo of the British heir.

Charlotte, the second child and only daughter of Prince William and Kate Middleton, was born at 8:34 a.m. on May 2, 2015 at St Mary’s Hospital in Paddington, London, according to The Royal Family. She’s currently third in line to the British throne behind her father and brother, Prince George, who turns 12 in July.

Princess Kate’s cancer diagnosis last year made the Prince and Princess of Wales “prioritize family and each other over everything else,” a source tells Vanity Fair. Now, with their three kids in tow,