Harry Potter star Daniel Radcliffe cast a spell over The Tonight Show ​audience Tuesday night, with a show-stopping performance of Blackalicious's classic rap hit Alphabet Aerobics.

"I've always had an obsession with memorizing complicated, lyrically intricate and fast songs," the British actor confessed to host Jimmy Fallon. "It's a disease."

The admission prompted Fallon to hand Radcliffe a microphone and the challenge of performing the super tricky song, which the 25-year-old actor handily accepted.

  • On mobile? Watch Daniel Radcliffe's performance here

Radcliffe stunned the audience, which gave him a standing ovation, when he dropped his accent and flawlessly conquered the song's tongue twisting rhymes, which include verbal hurdles like: 

Casually create catastrophes, casualties
Cancelling cats got their canopies collapsing
Detonate a dime of dank daily doin' dough
Demonstrations, Don Dada on the down low

If you want to see how the former boy wizard stacks up to the original, check out the Blackalicious's version in the video below. Warning: it contains explicit language.

  • On mobile? Watch Blackalicious perform Alphabet Aerobics here