Avengers Assemble - for a really heartwarming cause.
A host of Marvel stars including Ryan Reynolds, Chris Evans and Chris Pratt have come together to offer their support to a terminally ill little boy.
Almost anyone who is anyone in the MCU have recorded touching video messages to Aussie superhero fan Josh - who was given the devastating news that he had just months to live after being diagnosed with brain cancer.
Following the horrendous prognosis his family launched a huge social media campaign to help the youngster tick some items off his bucket list and get as many messages from his heroes as possible.
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And it caught the eye of some of his superhero idols - from Deadpool to Captain America and Spider-Man.
In a long post, a friend of the family wrote: "This is Josh, who has been fighting to survive since the day he was born. He has been battling leukemia and at the age of 15 has been diagnosed with stage four glioblastoma multi-forma brain cancer.
"His only wish is to meet or at least receive a message to himself from actor, more specifially Marvel actors."
Hearing the plea, a bunch of his favourite stars including Deadpool's Reynolds, Captain America star Evans, Tom Holland (Spider-Man), Chris Pratt (Star Lord) and Hugh Jackman (Wolverine) have responded with touching video messages.
Reynolds says that Josh looking up to superheroes is 'pretty funny - because you've got more courage in your pinky than all of those super heroes put together."
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Chris Evans jokes that he doesn't mind playing second favourite to Deadpool. "He gets to make the jokes. I don't get to make the jokes. So I suppose that's ok."
The family have also set up a GoFundMe page to help Josh complete his bucket list and create some amazing memories.
Because as we know - not all heroes wear capes.
Featured Image Credit: TwitterTopics: TV and Film, Celebrity