Over what was a four-day weekend for many Brits, members of the UK's Royal family came together to celebrate the Queen's Platinum Jubilee.
A range of events and pageants took place in the country to mark 70 years since Queen Elizabeth II acceded to the throne upon the passing of her father King George VI. The Queen is currently the longest-reigning monarch in British history.
But while the celebrations were put on to honor Her Majesty, it was her animated great-grandson Prince Louis who became the star of the show.
The little one was seen covering his mother Kate Middleton's mouth while she was speaking to him, shaking his finger at her and appearing to blow her a raspberry.
Prince Louis' behavior over the Jubilee weekend had plenty of people weighing in on whether it had crossed a line or not.
It also captured the attention of Supernanny star Jo Frost.
The 49-year-old parenting guru commented on a video of the toddler acting up, which was shared on Hello! Magazine's Instagram page.
Praising Kate for trying to nip his cheeky behavior in the bud, Frost wrote: "Love how mum is addressing in public prince Louis needing to listen up and do as his [sic] told."
Many agreed with the TV personality's comment, with one person writing: "Yep, she’s one tough loving, badass momma and he WILL be loved up and corralled into the required behaviour. Very lucky, loved up children."
Another said: "Children need discipline at any age."
The four-year-old Royal - who is Kate Middleton and Prince William's third child and fifth in line to the throne - entertained millions of Brits on Thursday (June 2) when he watched the Trooping of the Colour with his parents and was caught making grumpy facial expressions.
Some days later on Saturday (June 4), the youngster pulled faces yet again in the Royal box at a pageant in Cardiff, Wales.
In a number of images of the event, Prince Louis is seen covering his face with both hands, sucking his thumb, and sticking his tongue out at his mom.
Later on, he was seen pointing at performers in the street carnival and then leaving his seat so that he could sit on his grandfather Prince Charles' lap.
