The Duchess of Cambridge has gone into labour with her third child.
Kate has been admitted to the Lindo Wing of St Mary’s Hospital in Paddington, central London the same hospital where she gave birth to Prince George and Princess Charlotte.
It was announced last September that the Duke and Duchess were expecting their third baby.
Like her two previous pregnancies, they had to announce the news before she had reached the 12-week stage because she was suffering from hyperemesis gravidarum, an extreme form of morning sickness.
File pic: Police officers standing guard when Kate was delivering her second child.
In October, the palace said the baby was due in April. Her actual due date has never been confirmed and it is understood that the Duke and Duchess do not know the sex of the baby.
Barriers to create media pens and parking suspension signs have been in place outside the hospital since 9 April.
George and Charlotte attend a garden party on tour in Canada
Kate will be looked after by a similar team of doctors and nurses that helped her through the births of Prince George in July 2013 and Princess Charlotte in May 2015.
The Royal Household’s surgeon-gynaecologist, Guy Thorpe-Beeston, and consultant gynaecological surgeon Alan Farthing will be present for the birth. He is also surgeon-gynaecologist to the Queen.
Prince George of Cambridge after his christening at the Chapel Royal in St James’s Palace
Kate carried out her last royal engagement on 22 March at the Olympic Park with her husband. She was also seen at church in Windsor with the Royal Family on Easter Sunday.
The palace would not comment on when she will be returning to royal duties, but said she would spend this summer and early autumn focusing on her family.
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They have also not confirmed if Prince William will take any paternity leave. After the birth of Princess Charlotte, he took two weeks’ leave from his training to be an air ambulance pilot.
Once the baby is born they will return to Kensington Palace, which is where the family spend most of their time now that Prince William has given up his job as a pilot to dedicate himself to royal duties.
The Duke and Duchess of Cambridge with their family
A member of palace staff said that Prince George and Princess Charlotte are excited about having a sister or brother -and the Duke and Duchess have been hugely grateful for the warm wishes they have received from around the world.