THE Duchess of Cambridge will be joining the Queen to celebrate the historic moment she becomes the nation's longest-reigning monarch.
Her Majesty has invited Kate and Prince William to Balmoral on September 9 - the day she will have served 63 years and 217 days to overtake Queen Victoria, her great-great-grandmother.
In a relatively low-key affair, favoured by the Queen, the 89-year-old will be hosting a family dinner at her Aberdeenshire home to mark the momentous occasion, palace sources have revealed. Click link for full post from EXPRESS.