By Nick Romano
Updated November 28, 2015 at 08:27 PM EST
Credit: Lou Rocco/Getty Images)

Not many people can pull off a white suit. Like many of us, though, John Stamos gave it his best shot. The Fuller House actor shared a throwback photo from his high school days, and it’ll make you shout, “Have mercy!”

Stamos posted the prom photo to Instagram on Friday with the caption, “#TBT #Prom #Hair.”

“I know everybody says this, but in high school I really was the dorky kid,” he told Orange Coast Magazine of his years at John F. Kennedy High in La Palma. “I was into magic and theme parks. I was very innocent. When a lot of kids my age were going out drinking on Friday and Saturday nights, I was at Disneyland, going on the rides and listening to the bands.”