And you thought Prince George was the royal rascal!
Try as she might, Kate Middleton can’t keep her little ones in line all the time, but that’s just how we like them.
Prince Louis‘ adventurous side was accidentally captured in photographs taken by his mum to mark his first birthday.
Wearing a hand-me-down knitted jumper, Louis appeared to have rummaged in the freshly-cut grass before the Duchess of Cambridge took our favourite snap of the three-shot collection.
Beaming up at his mum with a super-cute toothy grin, Louis looks very chuffed with his adventurous efforts.
A second snap show’s the fifth in line to the throne sitting atop a moss-covered stone wall, once again showing off that cheeky grin and grass-smothered jumper.
“He really is the most cheerful, smiley little boy,” a source told PEOPLE. “He’s always so happy and content.”
Months earlier, Kate commented on Louis’ ability to crawl at high speeds.
Happy birthday for April 23, little Louis!
WATCH: LITTLE LOUIS’ SPECIAL DAY