Kensington Palace released a statement saying that Kate Middleton and Prince William are "delighted" by the news that Prince Harry and Meghan Markle are expecting their first child.
Harry and Markle's child will be seventh in line for the throne, and will have a different title than Middleton and William's children.
Their child will be known as Lord/Lady Mountbatten-Windsor at birth, unless the queen makes an exception.