The first day of the celebrations was to honor the Queen's 70 years on the throne.
The military held a parade in honor of the monarch's birthday. The Queen couldn't keep from smiling as she watched the parade from the balcony of Buckingham Palace.
Two people who have been absent from the Mountbatten-Windsor family fold for more than two years were among other members of the royal family who were watching from down the road.
In the Major General's Office overlooking the Horse Guards Parade, Prince Harry and his wife were photographed watching the parade.
The young royals watched and laughed as they were playfully shushing 3-year-olds.