"Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 1101hrs.
The baby weighs 8lbs 7oz.
The Duke of Cambridge was present for the birth.
Her Royal Highness and her child are both doing well.
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 new baby is fifth in line to the throne following his older brother, George, and older sister, Charlotte. Princess Charlotte is the first British princess to not move down the succession for a younger brother, due to the Succession to the Crown Act (2013), which provided for succession of the eldest child, regardless of sex.
Prince Harry is now in 6th place. The Duke of York has moved to seventh. Only the first six in line to the throne need the Sovereign's permission to marry. This means the Duke of York can marry without asking the Queen's permission.