It's Gary Shirley!
Amber Portwood’s baby daddy used to be a stylish blond toddler, but nowadays, he likes to rock T-shirts and baseball caps over his dark brown hair!
We think he looks a lot like his daughter, Leah, though, which is downright adorable.
Apparently (according to his Twitter), a lot of people thought it was Matthew McConaughey, and that’s quite a compliment.
Did you know it was Gary Shirley? Tell us below, and then click here to play more “Guess Who?”