Princess Anne will keep the title of Princess Royal as it is a lifelong title. Princess Anne, 72, is Queen Elizabeth II’s eldest daughter, and was given the honorary title in 1987.
There have been seven Princess Royals throughout history, with Princess Anne currently the seventh incumbent of the title. It is usually given to the first born daughter of a reigning monarch, and only held by one member of the Royal Family at a time.
Princess Anne famously turned down Queen Elizabeth II’s offer to make her daughter Zara Tindall a princess when she was born in 1981. However, she accepted her honorary title of Princess Royal in 1987 at the age of 37.