Robert Downey Jr. Gifts Bionic Iron Man Arm to Disabled 7-Year-Old Fan

Courtesy of Marvel Studios

The 'Iron Man' star presented a young superhero fan, born without a right arm, with new protective armor.

Iron Man just may have a new sidekick.

Robert Downey Jr. made a young fan's superhero dreams come true when he presented a 3-D-printed bionic Iron Man limb to Alex, a 7-year-old boy who was born with a partially developed right arm.

In a video posted on Downey Jr.'s Facebook page, the actor can be seen trying on his own Iron Man armor and comparing it to Alex's. "I think yours might be better than mine," he tells the young boy.

The artificial limb was built by Albert Manero in partnership with the nonprofit charity organization Limbitless Solutions. Downey Jr.'s gesture comes just over a week after he offered Avengers fans a chance to live a day in the life of Tony Stark for another charitable cause.

Watch the full encounter below.