From her success as an accomplished equestrian to her signature sunnies, here is Princess Anne's life in pictures:
Queen Elizabeth before her coronation.
The then Princess Elizabeth holds a newborn Princess Anne while Prince Charles stands beside them.
In this now iconic family shot, Princess Anne reaches out to her father.
The pair have always had a close bond.
Prince Charles holds his little sister's hand in Malta to greet their parents after their royal tour.
Princess Anne all grown up!
The stunning royal is captured on the grounds of Sandringham, before the 1969 Royal Tour of Australia and New Zealand.
Princess Anne, Prince Andrew, Prince Philip, Queen Elizabeth, Prince Edward and Prince Charles sit at Buckingham Palace.
Princess Anne on her wedding day with her husband Mark Phillips, her younger brother Prince Edward, and cousin Lady Sarah Armstrong-Jones.
HRH Princess Anne, aboard here horse Goodwill during the Mixed Three-Day Event Team Cross-Country Olympic Summer Games in Canada.
Princess Anne with Queen Elizabeth at her son, Peter Phillips christening.
Princess Anne leaving the hospital with a newborn Zara Phillips in tow.
Princess Diana talks to Princess Anne at the Derby.
Princess Anne and Kate Middleton sharing a laugh at the centenary of the Royal Air Force from the balcony of Buckingham Palace.
Princess Anne wearing her signature sunnies on the second day of the 160th Great Yorkshire Show.