PRINCE George is growing up fast. With the future king turning five, we thought we'd let you know all the details about his birthday.
So how is he celebrating, what do his parents Prince William and Kate Middleton have planned and how will the country mark the young royal's big day?
When is Prince George's fifth birthday?
Prince George was born on July 22, 2013.
His parents are Prince William and Kate Middleton, also known as the Duke and Duchess of Cambridge.
Kate gave birth at the Lindo Wing of St Mary's Hospital, London.
She and William introduced George to the world on the hospital's steps on July 23, 2013.
His name was announced as George Alexander Louis the following day, and his full title as His Royal Highness Prince George of Cambridge.
As the couple's eldest child, he's big brother to siblings Princess Charlotte and Prince Louis.
Where is Prince George celebrating his fifth birthday?
The royals tend to be fairly secretive about their lives away from official engagements, but it's been reported that Kate and William will hold a private party for George at their home in Kensington Palace.
It's thought that they'll invite friends and family, and it's likely that some of George's classmates from Thomas's School in Battersea will be in attendance.
Kate and William are also believed to have taken their first family holiday, which could be part of George's celebrations.
According to royal blogger , they were spotted arriving at St Lucia airport on July 18.
They then boarded a private plane to the small private island of Mustique, a destination associated with the Royal Family.
Kate's parents Michael and Carole are said to have also joined them, as well as her sister Pippa and her husband James Matthews.
It certainly sounds like George will have a blast.
How are royal birthdays usually marked?
Royal birthdays have been marked in several different ways.
For example, the Royal Horse Artillery celebrated the Duke of Edinburgh's 97th in June 2018 with a 41-gun salute in London's Hyde Park.
On the Queen's 92nd birthday in April 2018, gun salutes were held across the UK and in British overseas territory.
She also attended a concert at the Royal Albert Hall billed as The Queen's Birthday Party, where artists including Sting, Sir Tom Jones, Kylie Minogue, Shaggy and Craig David performed.
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How will Prince George's fifth birthday be marked?
The Royal Mint has released a £5 coin to celebrate George's special day.
The uncirculated coin features the iconic Saint George and the dragon, and is inscribed with the year 2018.
Dubbed "The Progress of the Prince", it's presented with fold-out packaging.
The special memento costs £13.
For royal enthusiasts, there are two other versions of the coin - which come with a slightly more expensive price tag.
There's an £82.50 silver proof piece and a £500 sovereign in 22-carat gold, which will be struck on George's birthday.
The Royal Mint also launched coins to mark George's christening, as well as his first and second birthdays.