The heart-breaking final wish of a dying child has been posted on Facebook in the hopes that it might come true.
The young girl just wants to know what will happen in the fourth Avengers movie, because if current medical advice proves correct, it tragically seems as though she may not be able to see it in the cinemas.
The wish was posted by a charity called My Shining Star Children's Cancer Society. They told the story of a girl called Keira who has been batting brain cancer. Recently she was given just a matter of months to live.
The Facebook post from the charity reads: "Keira has been given just 3-6months to live after a 4.5 year fight against brain cancer!!
"Her dying wish is to find out what happens in the next INFINITY WAR film. The family have tried everything to make this wish come true but everything so far has failed.
"As many of you know, we aren't a wish charity but a small organisation that deals with financial hardship, but this girl has battled cancer since childhood and she deserves her wish. WE MUST TRY!!! Please."
After this tragic appeal was posted on Tuesday, legions of Avengers and MCU fans worldwide have been doing their part to make sure that it gets to the people who could make it happen.
The appeal, which also went out on Twitter, has been retweeted more than 34,000 times and has more than 20,000 likes.
A lot of people have tagged well-known Avengers actors in the post, too. Actors such as Robert Downey Jr., Chris Hemsworth, Chris Pratt, Tom Hiddleston, and Zoe Saldana, have all been included in posts about Keira's wish.
It is a big ask - Marvel are famously secretive about what is allowed to come out about their films. Avengers: Infinity War was shrouded in secrecy until it was formally released.
However, Marvel has some form when it comes to looking after its fans, and the actors who star in the Marvel Cinematic Universe are usually pretty forthcoming with their time and have previously stepped in during situations like these.
Earlier in the year, Fox News's Shannon Bream posted a similar appeal, asking for MCU stars to meet up with a young boy who was also suffering from cancer.
The response was overwhelming. Ryan Reynolds - not technically an Avenger, but as Deadpool he's still a familiar face in the world of Marvel superheroes - volunteered, as did bona fide Avenger Chris Evans.
So, here's hoping that they can be reached and put something together to put a smile on this young fan's face.
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Featured Image Credit: My Shining Star Children's Cancer Charity / Marvel Studios