Robert Downey Jr. Makes 'Iron Boy' With Cystic Fibrosis An Honorary Member of Avengers

Last year, the man who plays Tony Stark in the Marvel Cinematic Universe, Robert Downey Jr., delivered a prosthetic 3D-printed Iron Man arm to a boy who was born only with one. This year, he's being a hero once again, fulfilling up a kid's wish.

Dominic, a young boy from Sydney, Australia, struggles daily with cystic fibrosis, but when he teamed up with Make-A-Wish Foundation, hope is restored. A helicopter lifted him up from the playground to a police headquarters where he found his custom, hand-made Iron Boy suit.

Then Dominic went off to save a hostage from some evil minion and eventually went to the Sydney Opera House to fight his powerful nemesis, Ultron.

Robert Downey Jr. sent a video to Dominic, in which he named the kid an honorary Avenger.