George, Charlotte and Louis greeted royal admirers as they rode along during the carriage procession.
Recognize Prince Louis' outfit? His dad William wore a very similar ensemble for Trooping the Colour when he was a kid.
The children bowed their heads as they received a salute during the royal procession.
Seriously, how adorable are they?
George, Louis and Charlotte checked out the views along with Princess Beatrice and Zara Tindall and Mike Tindall's 8-year-old daughter Mia Grace.
And Kate made sure to keep an eye on her little ones.
Louis saluted the officers and soldiers as they marched by.
We wonder what these two were talking about.
Louis seemed to point out the Royal Air Force flypast.
A picture says 1,000 words.
Although, Louis wasn't all smiles.
After all, he'd had quite the morning.
And he may have started to get a little bored.
But after some funny business, his mom stepped in.
Although, the noise from the aircrafts during the flypast may have been too loud for Louis' ears.
Poor little guy!
Still, he seemed to enjoy himself nonetheless.
He may be only 4, but it looks like Louis has already nailed his royal wave.
I mean...just look at this sweet photo.