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First, Will Smith gets jiggy with it on "The Late Show" and now the actor is rapping the theme song to his former hit show "The Fresh Prince of Bel-Air." Will was a guest on "Ellen" this week, and during his interview got up and started spitting out those famous rhymes -- with the help of the audience. 

In fact, there was a point in the song where the Fresh Prince forgot some of the lyrics! But in Will's defense, it HAS been almost 20 years since the final episode of the show. 

Watch Will Smith rap "The Prince of Bel-Air" theme song below: