Prince William and wife Kate, the Duke and Duchess of Cambridge, are expecting their second child, royal officials confirmed Tuesday.

“Their Royal Highnesses The Duke and Duchess of Cambridge are very pleased to announce that The Duchess of Cambridge is expecting their second child,” the statement from the Palace reads. “The Queen and members of both families are delighted with the news.”

Kate is nearly 3 months pregnant, according to ABC News.

The baby is expected in the spring and will be fourth in line to the British throne after grandfather Prince Charles, father Prince William, and big brother Prince George.

According to Palace officials, Kate is once again suffering from acute morning sickness as she did during her first pregnancy with her one-year-old son, George, and has canceled several upcoming engagements.

Prince George is going to be a big brother! The Duke and Duchess are expecting a second baby: http://t.co/v8rqcTieAV pic.twitter.com/0NSVVs3tUL

— Us Weekly (@usweekly) September 8, 2014

“As with her first pregnancy, The Duchess is suffering from Hyperemesis Gravidarum. Her Royal Highness will no longer accompany The Duke of Cambridge on their planned engagement in Oxford today. The Duchess is being treated by doctors at Kensington Palace,” the Palace said.

“She is at home being looked after by the surgeon gynecologist to the Queen, Alan Farthing, and the surgeon gynecologist to the royal household, Guy Thorpe-Beeston,” said a Palace rep.

A sibling for Prince George! Details of the announcement: http://t.co/eycU5XYZvS #KateMiddleton #PrinceWilliam pic.twitter.com/hawnR4S4a5

— InStyle (@InStyleMag) September 8, 2014

Kate was due to make her first solo royal engagement in Malta in less than two weeks, but it is unclear whether she will be able to honor her commitment given her morning sickness.

British Prime Minister David Cameron offered his congratulations to the expectant couple via Twitter.

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