“Batkid” has vanquished the worst villain of all.

Miles Scott, a little boy with cancer who became known as “Batkid” across the globe when he was granted a wish to be the Caped Crusader for a day, is now leukemia-free.

“After fighting his own heroic battle with leukemia since he was a year old, Miles visits his oncologist once a year, and has been in remission from leukemia for the past five years,” the Make-A-Wish foundation said in a statement.

Doctors generally consider patients cured when their cancer has been in remission for five years.

The California boy pulled the heartstrings of people across the country when, at 5 years old, he requested to become his favorite superhero for a day — and on Nov. 15, 2013, his wish was granted.

The late then-mayor, Ed Lee, and more than 20,000 volunteers turned San Francisco into Gotham City to make Miles’ dream come true.

The police chief asked boy to help to stop the Riddler and Penguin from destroying the city, and thousands of people came out to cheer him on during a staged event.

“Batkid Saves City,” declared a special edition of The San Francisco Chronicle.

The pint-sized Dark Knight received a key to the metropolis after freeing San Francisco Giants’ mascot Lou Seal.

Even then-President Barack Obama congratulated Batkid, saying in a video message, “Way to go, Miles! Way to save Gotham!”

The experience was chronicled in a 2015 documentary, “Batkid Begins.”

Miles, now 10 years old, has returned to life on his family’s farm, playing in Little League and selling his first goat at a local fair.

He’s in fifth grade and loves science and robotics.