Batkid, aka Miles Scott, remains cancer-free five years after battling both leukemia and the villains of Gotham City.
As reported by the San Francisco Chronicle, Miles was granted a wish by the Make-a-Wish Foundation in 2013 to become Batman, effectively turning San Francisco into Gotham City for a day with the help of 12,000 volunteers.
Miles cruised around the city in a Lamborghini that was made to look like the Batmobile, answered a call from the police commissioner, and faced down the Riddler and Penguin, ultimately being awarded the key to the city. According to the foundation, Miles received his last treatment just before becoming Batkid.
Source: IGN.com Batkid Remains Cancer-Free After Five Years