The Duke and Duchess of Cambridge only stayed at the hospital for another 24 hours after the birth of their first son and travelled back to their home in Kensington Palace.
A picture of a smiling Prince George was released by Britain's royal family on Saturday as Queen Elizabeth's great grandson, who is third in line to the throne, prepares to celebrate his fifth birthday.
Taking to Twitter, the Palace wrote: "The Duke and Duchess of Cambridge are very pleased to share a new photograph of Prince George to mark his fifth birthday - thank you everyone for your lovely messages".
George has made a number of eventful public appearances over the past 12 months, from starting school to a cheeky moment on Buckingham Palace's balcony, as the royal family celebrated the Queen's official birthday.
A few months after his last birthday George started his first day at school with his father, but without his mother, Kate.More news: Root century seals England series win over India
Despite being in force since 2013, the birth of Louis this year brought the act into place for the first time since its creation.
George was photographed with a rocking horse that Obama had given him when he was born.
Prince George aims a scowl towards the media at the Warsaw airport during an official visit to Poland on July 17, 2017.
George recently completed his first year at school, Thomas's Battersea in south London, where he played a sheep in the nativity play at Christmas.
Prince George fulfilled the dreams of many young boys when he sat in the cockpit of a jet plane.