The series shows the role that Prince Philip played in supporting the young queen after she was thrust onto the throne by the early death of her father king George VI in 1952, when she was 25. Other notable royals who attended the family gathering included James, Viscount Severn, Lady Louise Windsor 4.
The parade, which has marked the official birthday of the British Sovereign over 260 years, brings together over 1,400 parading soldiers, 200 horses and 400 musicians.
They also matched their outfits for the 2016 ceremony, and later that year during a visit to Canada.
Princess Charlotte, meanwhile, took a mini tumble that resulted in some tears: Right as she was peeking out over the balcony's balustrade, the munchkin lost her balance and fell backwards. The Queen turned 92 on her actual birthday on April 21. The timing is just another sign that Markle isn't wasting time when it comes to kicking off her official royal career as a duchess.
The duke and duchess, who married three weeks ago, made the short trip from Buckingham Palace to Horse Guards Parade in a horse-drawn carriage as royal fans lining the Mall cheered and waved on Saturday.
Meghan Markle's entry into the royal family began with her new in-laws appearing to be ever-so-slightly scandalized by her non-traditional wedding day choices and those breaks with the past may have continued this weekend.
The royal pair will open a theatre and science discovery centre after journeying overnight from London on Wednesday.
All of the Royal Family was in attendance.
This was 25 per cent up on the same period for the previous year, when she had been unwell with a heavy cold.