For instance, in his first birthday portraits, Prince Louis melted royal-watchers’ hearts in an adorable buttoned jumper.

However, it was in fact revealed to be a purchase from before even Prince George was born.

Childrenswear brand Elfie London confirmed on Instagram: “We were so pleased to spot Prince Louis in our Frog Jumper for his first birthday.

“This jumper was from one of our first collections over seven years ago!!