Robert Downey Jr gives 'Iron Man' prosthetic arm to 7-year-old

Twitter: @RobertDowneyJr

Actor Robert Downey Jr became a real life superhero after he gifted a 3D bionic 'Iron Man' arm to a little boy who was born with a partially developed right arm.

In a video posted on Facebook on March 12, Robert Downey Jr dressed up as his fictional character Tony Stark to deliver a robotic Iron Man arm to Alex, who loves superheroes, reports aceshowbiz.com.