Prince Louis is known for his cheeky antics. Whether he's blowing raspberries during the Jubilee or pulling funny faces during the Coronation, the youngster knows how to entertain himself - and his fans.
But the young Prince is melting hearts for a different reason entirely after he was spotted in a sweet moment with his mum, Princess Kate, in Westminster Abbey this morning.
As eagle-eyed viewers noticed, the five-year-old appeared to be dazzled by his mum's formalwear when she appeared in her dress and robe for today's ceremony.
In a particularly sweet moment, Louis can even be seen gazing up at Kate, with his mouth open in awe.
His reaction certainly makes sense considering all the pomp and pageantry surrounding the day.
But it delighted royal fans, nonetheless, as hundreds enjoyed watching his sweet response.
Reacting to the moment on Twitter, a fan said: "Louis is all of us looking at Kate." Another wrote: "Bless, she's just mum to him." A third added: "Louis is going to be a character as he grows up, I can just see it!!"
Elsewhere, other viewers jokingly suggested their own interpretations of the moment.
"Mum, I need a wee!, Mum, Mum, I need a weeeee!" one said. A second commented: "Moooooom, you promised we'd go see Guardians of the Galaxy 3 after this!"
Although he did not rush off to the cinema, Prince Louis did leave the service because of his young age. It is understood he was 'retired' during the proceedings, as planned.
King Charles himself only attended part of the service when his mother was crowned in 1953. At the time the Prince, aged four, sat between the Queen Mother and Princess Margaret and did not take part in any of the processions.