Kate Middleton, the Duchess of Cambridge and wife of Prince William, is expecting her second child and was being treated for severe morning sickness, royal officials announced on Monday.
The couple and their families were "delighted" with the news, according to their office, Clarence House. The child will be fourth in line to the throne, pushing Prince Harry to fifth. As the sibling of Prince George, Kate and William's first child, the baby will have the role of "spare to heir."
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The official account of the British Monarchy announced the news on Twitter.
The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting their second child
— BritishMonarchy (@BritishMonarchy) September 8, 2014
The duchess was being treated at Kensington Palace for severe morning sickness, Clarence House said. She suffered from morning sickness during her first pregnancy with Prince George, who was born in July 2013.
Prime Minister David Cameron said he was "delighted by the happy news that they're expecting another baby."
Many congratulations to the Duke and Duchess of Cambridge. I'm delighted by the happy news that they're expecting another baby.
— David Cameron (@David_Cameron) September 8, 2014
Kate has not yet reached the 12-week stage of her pregnancy, according to The Telegraph, and the the baby is expected to be born in the Spring of 2015.
Additional reporting by Mashable