Danish Crown Prince Frederik's and Crown Princess Mary's twins, Prince Vincent and Princess Josephine are celebrating their 13th birthday today, on January 8, 2024. The Royal Court released a new photo of the Prince and Princess on the occasion of the birthday. The twins were born at Rigshospitalet in Copenhagen by a time lag of 26 minutes, with Vincent being slightly older than his sister. The twins are the third and fourth children of the Crown Prince and Crown Princess.