Heroes aren't just confined to the big screen.

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On Sunday, Fox Newsjournalist Shannon Bream posted an open request on Twitter.

"Trying to help a young boy who is dying," she wrote. "He probably has just days and all he wants is a greeting from one of the Avengers."

Bream wanted to try and reach out to one of the Avengers, but didn't have their contact details.

"If you have a celeb connection, please let me know," she wrote. "Otherwise, could you help out with a RT?"

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It wasn't long before her tweet was going viral, and other people with verified accounts were chipping in to help.

Later that next day, the Avengers began to assemble.

Soon it wasn't just Avengers who were getting involved, either.

On Monday night, Bream tweeted an update. So far the little boy, Emilio, has received three messages from different Avengers. More are on the way, too.

As of Tuesday morning, more actors were still getting in touch on Twitter.

This is definitely the internet at its very best.

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