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The young fan can be seen wearing a hospital gown, which is believed to be a nod to the frequent trips Boseman took to visit poorly children in hospitals - even as he privately fought a four-year-long battle with colon cancer.
The artwork was created by Nikkolas Smith who shared pictures and a video of the unveiling via Instagram.
Alongside the pictures, Nikkolas wrote: "This one is special. My King Chad tribute is now on a wall on display at Downtown Disney.
"It is a full circle moment for me: my final two projects as a Disney Imagineer last summer were working on the Children's Hospital project and the Avengers Campus.
"To millions of kids, T'Challa was a legend larger than life, and there was no one more worthy to fill those shoes than Chadwick Boseman. I'm so thankful to be able to honour Chadwick's life and purpose in this way."
Commenting on the post about the mural, one fan wrote: "Absolutely incredible! Thank you for sharing this stunning tribute with the world. #wakandaforever."
Another added: "Absolutely beautiful. It makes me want to cry knowing this beautiful soul gave so much of himself during his illness."
A third commented: "Such a beautiful moment. Teared up with you holding your son in front of the art you created. So many s**tty things happening, it's heartening to see y'all shine so bright. Chadwick would be thrilled, I'm sure."
Boseman passed away at his home in Los Angeles on 28 August after a secret four-year battle with colon cancer. He was 43 when he died.
A number of friends and co-stars have spoken out to honour Chadwick since his untimely death. Michael B. Jordan reflected on how much he learned from his 'big brother' over the many years they knew each other just days after the actor passed away.
"One of the last times we spoke, you said we were forever linked, and now the truth of that means more to me than ever," Jordan, 33, wrote on Instagram in a touching tribute.
He went on: "Since nearly the beginning of my career, starting with All My Children when I was 16 years old you paved the way for me. You showed me how to be better, honor purpose, and create legacy. And whether you've known it or not...I've been watching, learning and constantly motivated by your greatness.
"You cared about me. You are my big brother, but I never fully got a chance to tell you, or to truly give you your flowers while you were here. I wish we had more time.
"I'm dedicating the rest of my days to live the way you did. With grace, courage, and no regrets. 'Is this your king!?' Yes . he . is! Rest In Power Brother."
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