All hail Britain’s newest longest-serving monarch, Queen Elizabeth II.
The 89-year-old has taken out the top spot from her great-great-grandmother, Queen Victoria, who held a firm rule for 63 years and 216 days.
The incredible milestone comes days after the Queen was voted the greatest-serving monarch in a comprehensive poll run by the Sunday Times.
The beloved royal will break away from tradition and spend the landmark day at her Scottish retreat, Balmoral, with loved ones before opening the new Borders Railway in nearby town, Galashiels.
Queen Elizabeth’s glorious rule began at the tender age of 25 following the tragic death of her treasured father, George VI in 1952.
“I declare before you all that my whole life, whether it be long or short, shall be devoted to your service and the service of our great imperial family to which we belong,” she humbly and solemnly promised the Commonwealth.
The ceremony took place at London's iconic Westminster Abbey in back in June 1953, changing her fate forever.
Throughout her momentous reign, she not only tended to all of her royal duties like a true professional but she also managed to raise her children and be adored by millions.
Prince William recently honoured his inspiring grandmother in the preface to her autobiography.
“I think I speak for my generation when I say that the example and continuity provided by The Queen is not only very rare among leaders but a great source of pride and reassurance,” the future king said aptly.
“The Queen’s kindness and sense of humour, her innate sense of calm and perspective and her love of family and home are all attributes I experience first-hand.”
Before concluding, “Speaking for myself, I am privileged to have The Queen as a model for a life of service to the public.”
In celebration of Queen Elizabeth II's landmark milestone of becoming Britain's longest-serving monarch, we take a retrospective look back at her remarkable reign.