Mario Lopez is a real golden boy!

The sexy "EXTRA" star stripped to his skivvies this weekend for a shoot for his underwear line, MaLo for Rated M -- where he was painted head to toe in gold paint for a Statue of David-inspired shoot.

"Malo" is all about “masculine with an edge," Lopez tweeted during the shoot ... along with over 30 photos. "Packaging is the statue of David, one of the most iconic bodies in the world."

There were a couple special visitors on set -- Mario's baby mama Courtney Mazza, adorable daughter Gia and his own mom!

 Check out all the behind-the-scenes photos above.

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