You'll Never Believe What Dwayne Johnson Looked Like at Age 15

What was The Rock cooking when he was a teenager? A "pornstache" fit for a narc.

Dwayne Johnson posted on his Instagram page on Friday a throwback pic of himself at that age, looking much skinnier and less muscular that he is today (but still pretty muscular), and sporting a full head of dark hair and a thin mustache.

"#flashbackfriday to that special time when I was a 15yr old punk kid, 6'4, barely 200lbs, creepy mustache and forced to leave Hawai'i to live in Nashville, TN - where I just enrolled in a new high school - and EVERYONE (students and teachers) treated me like I had the plague and stayed away because they were all convinced I was an undercover cop," the wrestling champion-turned blockbuster actor wrote. "True story."

"I had a WILD and unbelievable life and journey as a kid and teenager," he continued. "Kickin' puberty's ass from day 1.  #PornstacheJohnson #YoureUnderArrest."