Catherine, Duchess of Cambridge, the wife of Prince William , gave birth to the couple's third child on Monday, a son who becomes the fifth in line to the British throne. The Duke of Cambridge was present for the birth, at 11 a.m. local time at St. Mary's Hospital in Paddington, west London, Kensington Palace said. Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn son. Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn son. The newest arrival to the royal family weighs 8lbs 7oz (3.8 kilograms), and both mother and baby are "doing well," according to the Palace. "The Queen, The Duke of Edinburgh, The Prince of Wales, The Duchess of Cornwall, Prince Harry and members of both families have been informed and are delighted with the news," Kensington Palace said in a statement on Twitter. The family left the hospital shortly before 6 p.m local time. The family left the hospital shortly before 6 p.m local time. Catherine and William emerged onto the steps of the Lindo Wing to introduce the baby to the world's media shortly before 6 p.m. local time. Source:CNN