It's official, the Duchess Catherine has gone into labour.
The 36-year-old royal - who is already mum to Prince George, four, and Princess Charlotte, two, with husband Prince William - was admitted to hospital this morning, on Monday 23 April.
A statement released by Kensington Palace reads, "Her Royal Highness The Duchess of Cambridge was admitted to St. Mary’s Hospital, Paddington, London earlier this morning in the early stages of labour. The Duchess travelled by car from Kensington Palace to the Lindo Wing at St. Mary’s Hospital with The Duke of Cambridge."
Yesterday it was revealed that the British royal's sister, Pippa Middleton, is also reportedly pregnant. And the Duchess is said to be "overjoyed" by the news.
Catherine - who was known as Kate Middleton before her marriage - carried out her final official royal engagement on 22 March at the Team SportsAid event in London and will be on maternity leave until the autumn. It was expected that the baby would be welcomed on 22 or 23 April, the latter of which is England's St George's Day.
An insider recently spilled of the royal's maternity leave, "Kate is now officially on maternity leave until the autumn and looking forward to welcoming the new baby. The whole family is excited, including the children, who are very much aware that they are about to welcome a new brother or sister."
Since going on maternity leave, it's thought that Kate has been staying in the countryside with her parents, Carole and Michael Middleton.
"Kate is in Bucklebury with the children for the Easter weekend, putting her feet up and enjoying some well-earned rest," an insider said of her maternity leave last month. "The children are on Easter holiday now so they'll all stay at Carole and Michael's into the middle of next week and then return to Kensington Palace, where Kate will remain until she goes into labour. William may be back and forth due to work."