Princess Joan Prince Charles of Luxembourg (Charles Jean Philippe Joseph Marie Guillaume; born 10 May 2020) is the elder child and son of Hereditary Grand Duke Guillaume and Hereditary Grand Duchess Stéphanie.
He was born at Grand Duchess Charlotte Maternity Hospital in Luxembourg City.
[3][2] On 19 September 2020, Prince Charles was baptised at the Abbey of St. Maurice and St. Maurus of Clervaux in Luxembourg.
His godparents are his maternal aunt Countess Gaëlle de Lannoy and his paternal uncle Prince Louis of Luxembourg.
[8] Following his first birthday on 10 May 2021, the Luxembourg Post released a set of postage stamps commemorating Charles' first twelve months of life.