Princess Anne, the only daughter of Queen Elizabeth II and Prince Philip, has two children:
Peter Phillips: Peter Mark Andrew Phillips was born on November 15, 1977. He is the eldest child of Princess Anne and holds the title of “The Queen’s eldest grandson.” Peter is not a working member of the royal family and has pursued a career in the business and corporate world.
Zara Tindall: Zara Anne Elizabeth Tindall (née Phillips) was born on May 15, 1981. She is the second child of Princess Anne and holds the title of “The Queen’s second eldest granddaughter.” Zara is an accomplished equestrian and has represented Great Britain in various equestrian events, winning medals in the Olympics and other competitions.
Both Peter Phillips and Zara Tindall lead private lives and are not formally styled as “royal highnesses.” They have pursued their own careers and interests outside of the official royal duties. Princess Anne is known for her dedication to public service and has been involved in numerous charitable and philanthropic endeavors throughout her life.
Please note that personal details about public figures and their families may change over time, and I recommend referring to more recent and credible sources for the most up-to-date information on Princess Anne and her family.