Check out Dwayne 'The Rock' Johnson when he was 15 (Twitter)

We didn't peg Dwayne "The Rock" Johnson as the type who was a scrawny, string bean of a kid, but we didn't expect him to be Mr. Superbuff either!

The wrestler-turned-action movie star posted a vintage photo of himself on Twitter as part of the Throwback Thursday trend — and he was one jacked 15-year-old! He had amazingly broad shoulders, muscular arms, and tight abs as he struck a tough guy pose, shirtless of course, next to his 1980s boom box. And the pièce de résistance? Well, other than his dark head of hair, was … a mustache!

"We all start somewhere," the 41-year-old, whose new reality competition series "The Hero" debuts Thursday on TNT, wrote with the photo. He also used some amusing hashtags, including "#creepymustache," "#boombox," and "captainwhiteshorts."

When we first saw the photo, we actually questioned whether he could really have been 15 at the time — he just looks so … mature! — and apparently we weren't the only ones.


We must agree — pretty fierce for 15.