This famous Australian has tweeted out a picture of himself in his youth and you'll NEVER guess who it is.
Let us zoom in a bit there for you...
Still no idea? Well, he's not a singer, an artist, an actor, a politician or a designer...
Here's another shot of him in his early days.
That confident way he looks at the camera, you just know he'll be able to answer any questions you might have..
Give up?
IT'S DOCTOR KARL!!!!!!!
h/t Daily Mail
