"Will Smith wanted to see 'London's Harlem'!" tweeted MP Tessa Jowell, who, along with MP Chuka Umunna, the current Shadow Business Secretary, accompanied Smith to St Martin-in-the-Fields High School for Girls in Tulse Hill.
There he was welcomed by hundreds of shrieking students who immediately insisted he perform the Fresh Prince of Bel Air theme song for them.
Smith obliged, and a video of the brief but memorable a capella was soon uploaded to YouTube.
As NME notes, Smith's extemporaneous performance of the Fresh Prince rap at the South London school comes just one week after a teen's less authentic voicemail rendition of the song managed to shut down an entire school district after the line "shooting some b-ball outside of the school" was misheard by a receptionist as "shooting people outside of the school."