Robert Downey Jr. Invites Fan With Cystic Fibrosis to 'Captain America' Premiere

See the sweet message Iron Man sent to his fan.

— -- Iron Man to the rescue! When Vicky Keyte reached out to Robert Downey Jr. on Instagram about her son, who has cystic fibrosis, the famed actor came back with the sweetest gesture.

"Mr. Stark here. This is for Daniel (@envy_coatings) who was having a rough day recently. When I’m in the dumps, I’ve found this little getup to be helpful. P.S. Would you like to come to the LA premiere of Captain America: Civil War as my guest?" he wrote, next to a silly pic of him in a Tigger costume.

He added in classic Downey Jr. fashion: "If so, have your people call my people. All the best."

The actor, 50, invited the boy to the premiere after Keyte wrote a week ago that "This is my son Daniel and he has cystic fibrosis, he is seven years old and wants nothing more to meet his idol Robert Downey Jr (aka Iron Man)," tagging the actor's account in the post.

Keyte said Daniel "has managed to get past the bullies he faces from day to day by telling them the he too has a extra special port in his chest much like Iron Man has his arc reactor. I am sharing this in hope that Mr. Stark (as Daniel calls him out of the suit) could find a way to contact me on here as Daniel could really do with a little lift at the moment."

She added: "If this reaches him and Daniel could get a reply I hope that it could help him through his stay in hospital as it is starting to take its toll on him."

After seeing the actor's response, Keyte wrote "this is by far the best wake up call ever when I found Roberts [sic] reply (I was a blubbering wreck)."

She added, "I will keep everyone updated on the build up to the big day on Daniels progress and his day to day going ons and of course his tuxedo fitting that he has asked for today as he wants to fit in like a real star."

A request for comment from Downey's rep was not immediately returned.