Despite being younger than Prince George, Princess Charlotte has no problem taking care of her brother.

As all three Cambridge children stood neatly on the balcony of Buckingham Palace to mark the end of the Platinum Jubilee celebrations, Charlotte noticed George's little mishap out of the corner of her eye, as seen in the video People shared, rushed to correct him.

George put his hand on the edge of the balcony during the national anthem, "God Save the Queen," and his sister gently but clearly tapped his hand away. He did so and began to stand up straight with his arms at his sides. It may have been my imagination, but George seemed to be subtly glaring sideways at me.

That wasn't the only time Charlotte made sure her brothers behaved like princes during the Jubilee long weekend.

While Prince Louis delighted a large number of royal fans with his hilarious four-year-old antics, Charlotte was not so amused.

During Thursday's Trooping the Colors carriage procession, she tried to stop Prince Louis from waving vigorously, but he wouldn't listen. And during Sunday's jubilee pageant, Louis tried to lie down with his legs over Charlotte, but she wouldn't let him. She was comically photographed pushing her brother's legs apart, then calmly turned back to watch the show.

All three Cambridge children seem to have the biggest personalities, which is endlessly endearing to witness.