Kate Middleton, the Duchess of Cambridge has gone into labour.
Kensington Palace announced the news on Twitter.
The 32-year-old royal was admitted to the Lindo Wing at St Mary's Hospital.
This will be the second child for Prince William and Kate who was scheduled to give birth last month. Their son, Prince George, was born on 22 July 2013.
Meanwhile, a friend close to Kate told People that she "is ready to go" to hospital anytime as she passed her late-April due date.
"She looks great and she has seemed completely chilled out about it all," the source said.