You may remember the heartwarming story of actor Robert Downey Jr. becoming a real-life superhero for a very special young fan.

This past weekend, Downey delivered a special surprise to 7-year-old Alex Pring in Georgia. The little boy, who loves superheroes, was born with a partially developed right arm.

In a video that's gone viral, Alex walks into a room to find Downey, as his “Iron Man” alter ego (watch below).

Downey presented Alex with a bionic 3D printed arm, specially made for the boy.

The arm was provided at no cost to Alex's family thanks to Albert Manero, a student at the University of Central Florida.

On "Fox and Friends Weekend," Alex and his mom, Alyson, spoke about the amazing gift from Iron Man himself.

"I was so excited," Alex said of his run-in with a superhero.

Alison revealed that all the kids in Alex's class are talking about how awesome Alex is and how amazing his new arm is.

"They want to be just like him," she said.

Alex said he's the coolest kid in school now.

Watch the heartwarming "Fox and Friends Weekend" clip above.

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