Who knew Harry Potter could rap? Daniel Radcliffe brought the house down with his rendition of Blackalicious' "Alphabet Aerobics" during a visit to The Tonight Show Starring Jimmy Fallon on Tuesday, Oct. 28.

The British star dropped his accent for his show-stopping performance, displaying his verbal prowess as he raced through each and every tongue-twisting lyric from the classic 1999 rap hit.

Talking before his performance, the Horns star explained learning all the words to his favorite rap songs was a bit of compulsion for him.

"Initially I got into Eminem and was obsessed with learning all the words to 'Real Slim Shady'," the 25-year-old star explained. "There's also a guy called Plan B in England. I've always had an obsession with memorizing complicated and intricate fast songs. It's a disease."

Leading the actor into his performance, Fallon asked, "Like Blackalicious’ 'Alphabet Aerobics?'"

"That would be one," an apparently apprehensive Radcliffe replied.

"You know how to do the whole song?" marveled Fallon. "That's one of the trickiest, fastest songs I know."

Watch the video to see Radcliffe's surprising talent!