Royal baby: Prince William and Catherine welcome baby girl
2 May 2015 Last updated at 22:42 BST
The Duchess of Cambridge has given birth to a girl, Kensington Palace has announced.
The baby, who is fourth in line to the throne, was "safely delivered" at 08:34 BST, the palace said in a statement.
The Duke of Cambridge was present for the birth of the baby, who weighs 8lbs 3oz (3.7kg).
Royal correspondent Nicholas Witchell reports.