Prince George No. 1 Aston Villa
The Duke, president of the Football Association, is a Aston Villa fan himself - and the club marked the birth of his first son by personalising a baby shirt with 'HRH' on the back, and posting the image on Twitter.
"Congratulations to the Duke and Duchess of Cambridge. Another Villa fan arrives into the world!"
Reportedly, the Duke hopes his new son will be a lifelong Villa fan, along with his father, actor Tom Hanks and Prime Minister David Cameron.
Aston Villa next face Tottenham Hotspur in the Capital One Cup!