Anne, who turned the milestone age on August 15, has two biological children, Peter and Zara, from her first marriage to Captain Mark Phillips; they married in 1973 and divorced in 1992. That same year, Anne married Vice Admiral Sir Timothy Laurence, but he has no children, and, therefore, Anne has no stepchildren.

Princess Anne, the late Queen Elizabeth's only daughter and a former Olympic equestrian, turns 75 on Friday, with little fanfare planned in keeping with the royal's disdain for making a fuss.

The Queen’s only daughter was captured at her Gloucestershire home, Gatcombe Park, by British portrait photographer John Swannell