Case closed.

The natty, fedora-wearing, French “detective’’ at the center of a sensational photo mystery outside the Louvre Museum after last month’s jewel heist has finally been unmasked — as a 15-year-old boy.

Pedro Elias Garzon Delvaux, a k a “Fedora Man,” sparked a frenzy when he was snapped wearing his brown hat at the perfect jaunty angle, a fashionable vest and classy tie while wielding a wooden-handled umbrella — and a knowing look — as he stood by cops guarding an entrance at the world-famous Parisian art mecca Oct. 19, just after the wild theft.

But the boy cosplayer had kept his identity a secret — till now.

“I didn’t want to say immediately it was me,” he said in an interview with The Associated Press . “With this photo, there is a mystery, so you have to make it last.”

See Full Page