The Duke and Duchess of Sussex proudly showed off their new baby son to the world's media. Baby Sussex was born Monday at 4:26 a.m. GMT weighing 3.3kg (7lb 3oz). Their family has welcomed the new arrival, with Prince William saying he was "absolutely thrilled." The infant is seventh in line to the British throne and is the eighth great-grandchild of 93-year-old Elizabeth, Britain's longest reigning monarch. Prince Harry and Meghan have named their son Archie.