UPDATE: It's a boy! The official announcement:
"Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 4.24pm.As expected, names are yet to come. Congratulations to William and Kate!
The baby weighs 8lbs 6oz.
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 and will remain in hospital overnight."
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This morning it was confirmed that the Duchess of Cambridge has been admitted to the hospital to give birth.
Her Royal Highness The Duchess of Cambridge has been admitted to St. Mary’s Hospital, Paddington, London in the early stages of labour.
— Clarence House (@ClarenceHouse) July 22, 2013
The Duchess travelled by car from Kensington Palace to the Lindo Wing at St. Mary’s Hospital with The Duke of Cambridge.
— Clarence House (@ClarenceHouse) July 22, 2013
Now that we've paused for this breaking news chat, the Belgian abdication post will come on Tuesday, followed by the rest of the week's business.