Duke and Duchess of Cambridge announce pregnancy

In a statement released this morning, Kensington Palace said the duchess is suffering from severe morning sickness, as she did with her previous pregnancies.

A public engagement she had planned for today has been cancelled.

The statement said: "Their royal highnesses the Duke and Duchess of Cambridge are very pleased to announce that the Duchess of Cambridge is expecting their third child.

"The Queen and members of both families are delighted with the news.

"As with her previous two pregnancies, the Duchess is suffering from Hyperemesis Gravidarum.

"Her royal highness will no longer carry out her planned engagement at the Hornsey Road Children's Centre in London today.

"The Duchess is being cared for at Kensington Palace."

Their first child, Prince George, was born in July, 2013 followed by Princess Charlotte on May, 2015.

The couple's third child will be born fifth in line to the throne, bumping uncle Harry out of the top five and into sixth place.