The birth was announced via a formal press release issued by Kensington Palace, which stated that the duchess "was safely delivered of a son" at 4:24 p.m., local time, weighing 8 lbs., 6 oz.
"The Duke of Cambridge was present for the birth," the statement added. "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."
"Right across the country and indeed right across the Commonwealth people will be celebrating and wishing the royal couple well," Prime Minister David Cameron told waiting reporters in front of 10 Downing Street. "It is an important moment in the life of our nation but I suppose above all it's a wonderful moment for a warm and loving couple who got a brand new baby boy. It's been a remarkable few years for our royal family -- a royal wedding that captured people's hearts, that extraordinary and magnificent Jubilee and now this royal birth, all from a family that have given this nation so much incredible service, and they can know that a proud nation is celebrating with a very proud and happy couple tonight."
