London: Buckingham Palace says Peter Phillips and his wife, Autumn, are expecting their second child, who will be Queen Elizabeth II`s second great-grandchild.
The baby is due in March.
The palace said on Friday that the Queen, her husband the Duke of Edinburgh and Autumn`s family are delighted by the news.
The couple already have a daughter Savannah — born in December — who is 12th in line to the throne and was the Queen`s first great-grandchild.
Peter Phillips, the son of Princess Anne, is the Queen`s oldest grandchild. He is 11th in line to the throne, and married Montreal-born Autumn in May 2008 at Windsor Castle.