Kensington Palace on Monday said that Kate Middleton, the Duchess of Cambridge, is expecting her third child with her husband William. “Their Royal Highnesses the Duke and Duchess of Cambridge are very pleased to announce that the Duchess of Cambridge is expecting their third child,” their statement said.

They added that she is suffering from severe morning sickness, as she did with her previous pregnancies. She had to cancel an engagement in London on Monday because of her morning sickness, which prompted the Palace to announce her pregnancy. The duke and duchess have two children – four-year-old George and two-year-old Charlotte.

Prince William is second in line to the throne, after his father Prince Charles. Their next child will be fifth in line to the throne, The Guardian reported. A new law, applicable to babies of the family born after 28 October, 2011, allows Charlotte to remain in the line of succession – earlier she would not have been in line for the throne because of her gender.

William and Kate made their last public appearance on Wednesday, when they visited the White Garden in memory of the late Princess Diana ahead of the 20th anniversary of her death.