Prince George is celebrating his fifth birthday on Sunday.

Here are some of the highlights so far for the young prince who is third in line to the throne.

The safe hands of the Duchess of Cambridge with her son Prince George of Cambridge who was born yesterday, leave the Lindo Wing of St Mary's Hospital in west London
George was introduced to the world on the day he was born, carried out of the Lindo Wing of St Mary’s Hospital in west London by his mother (John Stillwell/PA)
The Duke and Duchess of Cambridge leave the Lindo Wing of St Mary's Hospital in London, with their newborn son, Prince George of Cambridge
The Duke and Duchess of Cambridge leave hospital with George on July 22  2013  (Dominic Lipinski/PA)
Arriving in New Zealand
Less than a year later, Prince George was on international royal duties – joining his parents on their official tour to New Zealand and Australia (Anthony Devlin/PA)
Royal visit to Australia and NZ – Day 3
George had a chance to play with some Kiwi kids when he attended a children’s play group in Wellington (Anthony Devlin/PA)
Royal visit to Australia and NZ – Day 14
George was rather taken with a bilby, also called George, at Taronga Zoo in Sydney (Chris Jackson/PA)
The Duchess of Cornwall, the Prince of Wales, Prince George, the Duke and Duchess of Cambridge, Queen Elizabeth II, Prince Harry, James Viscount Severn, the Duke of Edinburgh and the Duke of York on the balcony at Buckingham Palace following Trooping the Colour at Horse Guards Parade, London, in 2015
George had prime position to watch the Trooping the Colour in 2015, held safely in his father’s arms on the balcony at Buckingham Palace (Jonathan Brady/PA)
The Duke of Cambridge with his son Prince George as he arrives at the Lindo Wing of St Mary's Hospital in London, after the birth of his newborn daughter
It was back to the Lindo Wing in 2015, to meet his baby sister Princess for the first time on May 2 (Anthony Devlin/PA)
Prince George with Princess Charlotte
Their mother Kate shared a picture she had taken of a serious-faced George holding his baby sister  (Duchess of Cambridge/PA)
Prince George leaves the Church of St Mary Magdalene in Sandringham, Norfolk, as Princess Charlotte will be christened in front of the Queen and close family
It was another solemn picture of George later in the year when he attended his sister’s christening (Chris Jackson/PA)
The Duke and Duchess of Cambridge and their children, Prince George and Princess Charlotte, visit Airbus in Hamburg, Germany
At the Airbus headquarters in Hamburg during an official visit to Germany George was trying to put his best foot forward (Jane Barlow/PA)
Prince George stands in a rescue helicopter as his father the Duke of Cambridge adjusts a helmet for him to wear, during a visit to Airbus in Hamburg, Germany with the Duchess of Cambridge and sister Princess Charlotte
Prince George is said to already have a love of helicopters, which his father flew both in the Air Force and as an air ambulance pilot (Dominic Lipinski/PA)
Prince George sits in a Squirrel helicopter with his parents the Duke and Duchess of Cambridge during a visit to the Royal International Air Tattoo at RAF Fairford - the world's largest military airshow
George got to sit in a Squirrel helicopter when the family visited the Royal International Air Tattoo at RAF Fairford (Richard Pohle/The Times/PA)
Prince George meets Barack Obama
Pyjamas were the dress code when George met US President Barack Obama during his visit ti the UK in 2016 (Kensington Palace/Pete Souza/PA)
Prince George first day at school
George shakes hands with Helen Haslem, head of the lower school on his first day at Thomas’s Battersea (Richard Pohle/The Times/PA)
The Duke and Duchess of Cambridge, Prince George and Princess Charlotte wave to the crowd before departing by sea plane from Victoria Harbour Airport in Victoria, Canada, on the eighth day of the Royal Tour to Canada
Not long after his first day at school, George was away again with the family – this time on an official visit to Canada (Dominic Lipinski/PA)
The Duchess of Cambridge and Prince George after a ceremony to mark their departure at Victoria Harbour seaplane terminal in Victoria during the Royal Tour of Canada
It was a double-handed wave for the young prince as he departed from the Victoria Harbour seaplane terminal (Mark Large/Daily Mail/PA)
The Duchess of Cambridge (sitting) with Prince George and Autumn Phillips and her children, Savannah and Isla, as her husband the Duke of Cambridge takes part in the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club, Downfarm House, Westonbirt, Tetbury
But it’s not all official photo calls for the young prince – here he played with his mother and Autumn Phillips and her children, Savannah and Isla, while the Duke of Cambridge played polo at Beaufort Polo Club (Steve Parsons/PA)
Prince George plays with a toy gun as he sits with his mother the Duchess of Cambridge (left), whilst his father the Duke of Cambridge takes part in the Maserati Royal Charity Polo Trophy at the Beaufort Polo Club, Downfarm House, Westonbirt, Tetbury
Possibly predicting a career in the military when he’s older, George had a keen aim while playing with a toy gun during his day out at the polo (Steve Parsons/PA)
Royal Visit to Canada – Day Six
And like any young child, he seemed fascinated by bubbles (Chris Jackson/PA)
George and Charlotte at Pippa Middleton's wedding
Prince George with his sister were attendants for their Auntie Pippa’s wedding in May last year (Justin Tallis/PA)
The Duchess of Cambridge, Prince George and Princess Charlotte with other bridesmaids and members of the wedding party arrive at St George's Chapel in Windsor Castle for the wedding of Prince Harry and Meghan Markle
Proving to be somewhat of an expert at page boy duties, George was also in the official party for his Uncle Harry’s wedding to Meghan Markle (Jane Barlow/PA)
The Duke of Cambridge with Prince George leaving St George's Chapel in Windsor Castle after the wedding of Prince Harry and Meghan Markle
George wore a miniature version of his father’s Blues and Royals uniform for the ceremony at St George’s Chapel in Windsor Castle (Jane Barlow/PA)
George and Charlotte after the birth of Prince Louis
George looked less certain than his sister at the crowds who watched them arrive at the hospital after the birth of their brother Louis earlier this year (Kirsty O’Connor/PA)
Princess Charlotte and Prince George hold the hands of their father, the Duke of Cambridge, as they arrive at the Chapel Royal, St James's Palace, London for the christening of their brother, Prince Louis, who is being carried by their mother, the Duchess of Cambridge
But he seemed more at ease when the whole family were pictured together for the first time at the christening for Louis (Dominic Lipinski/PA)
Prince George Birthday
The Duke and Duchess of Cambridge have issued this new photograph of Prince George as he marks his fifth birthday (Matt Porteous/PA)