However, George's grandmother, and Kate's mother, Carole Middleton might have dropped a hint as to what may be involved with the young royal's party. Carole is the founder of Party Pieces, and the company recently released a whole set of football-themed goodies. Items include paper plates in the shape of a football and balloons shaped like a golden trophy.
WATCH: New photograph marks Prince George's ninth birthday
George is known to be a huge football fan and the young royal has even played for his school's team, sporting their colours, which consisted of a blue and white striped jersey over a long sleeved top, shorts and bright yellow football boots.
The youngster was also noticeably upset when England lost in last year's rescheduled 2020 European Championships final and he also wore an England shirt for birthday pictures taken for his seventh birthday by his mum.
And who could forget his enthusiastic reaction after England scored against Italy in the finals of last year's Euros?
George is a big fan of football
George received a sweet treat on his birthday, when the band of the Irish Guards played Happy Birthday for him.
In the clip, a magnificent band of trumpeters could be seen standing in a semi-circle as they performed the merry birthday tune.
Wearing their full-dress uniform complete with busby hats, the Irish Guards put on a memorable show right in front of the Queen's London residence at Buckingham Palace.
Carole is the founder of Party Pieces
A caption read: "Thank you @IrishGuardsBand for playing Happy Birthday to mark Prince George's birthday today! The Duke of Cambridge is the Colonel of the @irish_guards."
Royal fans went wild in the comment section with one writing: "How lovely! Happy Birthday to HRH Prince George!", whilst a second penned: "Love this SO MUCH! Happy 9th birthday Prince George!"
Impressed by the touching tribute, a third fan added: "How cool to have the @IrishGuardsBand play at your birthday!!", and a fourth remarked: "Such a beautiful and thoughtful gift, I'm sure Prince George loved it."
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