By all accounts, George was quite the snappy dresser. He considered himself the height of fashion, and if portraits from his regency are any indication, he was dead right. Behold:
He apparently was a fashion icon even as a child. Here he is pretending to be a sheriff from the old west:
But the key here is not just his knowledge that the right accessories make the outfit (although this is true); the most important element of George's look is his glorious, glorious hair.
Presumably he posed for this portrait indoors, so his hair is not blowing in the breeze. It's just sitting on his head like that. It's so thick and luxurious!
I imagine that he had a royal hair stylist that he would order around. "No! Brush it forward from the back of my head!"
"Make it fluffier. No, fluffier. Fluffier still."
King George IV, you are probably remembered for a lot of things. Things that I am too lazy to look up. But today, I salute you for having the most bangin' hair to ever grace the head of a royal. And this is in the days before widely-available hair products and styling tools! I'm impressed.