Aside from playing superhero Tony Stark/Iron Man in blockbusters such as Marvel's Avengers: Age of Ultron, Robert Downey Jr. has proven on several occasions that he is a real-life hero, especially to brave young kids. Back in March, Robert Downey Jr. teamed up with Microsoft's The Collective Project to present a new 3D-printed bionic arm inspired by Iron Man to a young boy named Alex Pring, who was born with a partially-developed right arm. Today, the actor posted a strange photo on Instagram of himself in a silly Tigger costume from Winnie the Pooh, and as it turns out, this was also part of an effort to help another young boy, inviting him to the Captain America: Civil War premiere.

The actor's photo came in response to a post from Vicky Keyte on Instagram, whose seven-year-old son Daniel has Cystic Fibrosis. She revealed in her post that her son would love nothing more than to meet his idol, Robert Downey Jr., since he dodges bullies by telling them he has a port in his chest, just like Iron Man's arc reactor. The boy's mother was trying to reach out to the actor through Instagram because her son was feeling particularly "down" recently, after one of his classmates told him that all kids with CF die. The actor did respond with the photo below, along with this message.

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"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? If so, have your people call my people. All the best."

We don't know exactly when the Captain America: Civil War premiere will take place, but we're assuming it will be sometime in mid to late April, leading up to the Marvel Phase Three movie's May 6, 2016 debut in theaters. Daniel's mother Vicky responded to the actor's message, by thanking everyone who helped share her message, which found its way to Robert Downey Jr. Vicky revealed in a follow-up post that she will be providing updates leading up to the premiere, which you can follow at Here's what she had to say below.

"I want to say a huge thank you to everyone that helped to make this possible and a massive thank you to @robertdowneyjr for Daniel's invite to join you in LA. We physically can not believe it and can't ever imagine a way to thank everyone enough, I will keep everyone updated on the build up to the big day on Daniel's 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 (not that he is not the biggest star in my eyes). Thank you everyone. This is by far the best wake up call ever when I found Robert's reply (I was a blubbering wreck)."

Captain America: Civil War picks up where Avengers: Age of Ultron left off, as Steve Rogers leads the new team of Avengers in their continued efforts to safeguard humanity. After another international incident involving the Avengers results in collateral damage, political pressure mounts to install a system of accountability and a governing body to determine when to enlist the services of the team. The new status quo fractures the Avengers while they try to protect the world from a new and nefarious villain. Take a look at Vicky's original post below, along with Robert Downey Jr.'s follow-up and a video of young Daniel reacting to the news that he will get to meet Robert Downey Jr. at the premiere.