8 September 2015

Key milestones in Queen Elizabeth II's life

This is a Dec. 21, 1984 file photo of from left to right, the Queen Mother, Queen Elizabeth II, Prince William, Prince Harry and the Prince and Princess of Wales after the christening ceremony of Prince Harry in London.
Queen Elizabeth II is set to become Britain's longest-reigning monarch on Wednesday, surpassing her great-great-grandmother Queen Victoria. Here are the key milestones in her life: