The Duke and Duchess of Cambridge have left hospital with their new baby daughter, who slept throughout
The new princess was born at 08:34 BST (07:34 GMT), on 2 May, 2015, two-and-a-half hours after the Duchess of Cambridge was admitted to hospital
Prince William told reporters he was "very happy" at the arrival of his second child
The duke brought Prince George to the hospital so that the young prince could meet his sister
The name of the baby, fourth in line to the throne, is yet to be announced
Other politicians have also take time away from the election campaign trail to pass on their warm wishes, including First Minister of Scotland Nicola Sturgeon, who tweeted, external: "I am delighted at the news of the birth of Prince William and Catherine's daughter and send them my warmest congratulations."
Image source, Getty ImagesRoyal fans have been celebrating the announcement of the arrival of the baby princess outside the Lindo Wing - where the massed media are now waiting for their first glimpse of the new royal.
The arrival of a girl is understood to be a surprise for the duke and duchess, who are believed to have not chosen to find out the sex of their baby in advance.
Meanwhile, Labour leader Ed Miliband tweeted, external: "Congratulations to the Duke and Duchess on the birth of their daughter. Wishing them lots of joy and happiness - and hopefully some sleep!"
Deputy Prime Minister Nick Clegg said he and his wife Miriam wished them "all the best as their family grows".
Prime Minister David Cameron has congratulated the couple, tweeting, external: "Congratulations to the Duke and Duchess of Cambridge on the birth of their baby girl. I'm absolutely delighted for them."
Image source, BBC An unofficial town crier announced the news at the Lindo Wing.
We know the new arrival is officially a princess but there is no announcement as yet on a name. We'll be reporting any further developments and reaction during the day following the news from the Lindo Wing, at St Mary's Hospital, in central London.
Here's the statement from the Palace:
"Her Royal Highness, the Duchess of Cambridge was safely delivered of a daughter at 8.34am. The baby weighs 8lbs 3oz. The Duke of Cambridge was present for the birth.
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. Her Royal Highness and her child are both doing well."
It's a girl! The news that royal watchers had been waiting for has been announced by Kensington Palace - the Duchess of Cambridge safely delivered her second child, a daughter, at 08:34 BST.