Sarah, Duchess of York (Sarah Margaret; née Ferguson; born 15 October 1959) is the former wife of Prince Andrew, Duke of York, the second son of Queen Elizabeth II and Prince Philip, Duke of Edinburgh. Popularly referred to as "Fergie", she is a charity patron, spokesperson, writer, film producer and television personality. She wrote the Budgie the Little Helicopter book series as well based on her experiences of the Royal Navy. She is the younger daughter of Major Ronald Ferguson and Susan Barrantes (née Wright). Her children, Princesses Beatrice and Eugenie of York, are respectively sixth and seventh in line to succeed their grandmother as monarch of 16 independent Commonwealth realms.