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.

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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.

Daniel Radcliffe showed off an unexpected talent on The Tonight Show -- he can rap! Credit: Douglas Gorenstein/NBC/NBCU Photo Bank via Getty

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

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"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?'"

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

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Daniel Radcliffe Is a Rapper! Watch the Harry Potter Star Nail "Alphabet Aerobics"