The Duchess of Cambridge has given birth to a baby girl this morning at 08:34 BST. Both mother and daughter are "doing well", Kensington Palace announces.
The duchess had earlier been admitted to the Lindo Wing at St Mary's Hospital where Prince George was born in July 2013.
The statement from Kensington Palace 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."
The baby weighs 8lbs 3oz (3.7kg).
On Thursday,Prince Charles had said he was hoping the duchess gave birth to a girl.