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14/11/2013 05:29 GMT | Updated 23/01/2014 18:58 GMT

Batkid's Wish Comes True: San Francisco Becomes Gotham City For Miles, Five-Year-Old With Cancer

Make A Wish

Holy tear-jerker Batman! A five-year-old leukemia patient is set to become 'Batkid' for a day with the help of thousands of kind-hearted volunteers.

San Francisco is set to be turned into Gotham City after a plea for help went viral.

Miles, from northern California, had only one desire when the Make-a-Wish foundation came knocking - to become the caped crusader.

Now, thanks to more than 10,000 people his wish is to become a reality.

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On Friday, Miles will rescue a damsel in distress, capture the Riddler in a bank vault, chase the Penguin around town and then receive the key to the city from a grateful mayor and police chief.

DC Comics is also thinking of writing a special comic book featuring Batkid and the Dark Knight trilogy composer Hans Zimmer has offered to write Batkid his own theme song.

Make-a-Wish rarely asks the public to get involved in helping to grant the wishes of the sick children they work with.

"This is one that we thought of as a great opportunity for people to share in the power of a wish so they can see how it affects not only the children and their families, but also the other people involved," Jen Wilson, marketing and promotions manager for Make-a-Wish in San Francisco, told ABCNews.com.

"It has a big impact on many people."

"When we interviewed Miles for a wish, he surprised even his parents: he wishes to BE Batkid!" Make-a-Wish said in a statement. "He is a sunny, positive little boy and finds his inspiration in super heroes,"

Ms Wilson said thousands of people will be on hand to cheer on Miles.

"Since he wants to be a superhero, we felt like having a large crowd there waiting with signs and cheering him on would make him feel like a hero, not just because he battle villains and helped fight crime, but he's a true hero," she said.

"We've gotten people who want to volunteer to participate, actors reaching out asking if they can play a role, photographers and videographers offering their services, people who want to give Miles gifts, makeup artists willing to donate their services, a fire truck that want to come out and show their support," Wilson said. "It's quite a range."