Will Smith Surprises Audience With 'Fresh Prince of Bel Air' Reunion on UK Talk Show [VIDEO]

Actor Will Smith and his fellow "The Fresh Prince of Bel-Air" costars entertained the audience of "The Graham Norton Show" on Friday with a surprise performance of the theme song to the classic 90's TV show.

Smith was in London to see his eldest son Trey who is a DJ, perform a set at a local club, where he was joined by his costars as well as to attend a few events with son and star of the remake "The Karate Kid", Jaden.

The father and son duo appeared on "Graham Norton" Friday to promote their upcoming apocalyptic sci-fi adventure "After Earth".

When Smith last appeared on the U.K. talk show, he broke into the catchy tune [the theme song to "The Fresh Prince of Bel-Air"] and the performance acquired more than 8 million hits on YouTube.

This time, the actor took it a bit further. Talk show host Graham Norton teased to Jaden Smith's rap skills and prompted the duo to perform. Soon after, the eldest Smith decided to introduce his former costar and musical partner, DJ Jazzy Jeff, in an attempt to recreate some of the initial magic.

The trio performed the theme song to the audience's enjoyment with Norton's guests Heather Graham and Bradley Cooper dancing along.

Smith then introduced a secret surprise guest: Alfonso Ribeiro, who played cousin Carlton on the show. Ribeiro's character, who was known for his signature sideswing and snap dance to Tom Jones' "It's Not Unusual" performed the dance for the ecstatic audience with Smith by his side.

 Norton then joined the fun, dancing with the rest of them to the Sugarhill Gang's "Apache" which was featured on a very popular episode of the 90's TV show.

"Just a little treat for you," Smith said at the end of the surprise reunion performance.

"After Earth" is in theaters May 31.

Check out videos of the high energy performance and vintage clips of the theme song and "Apache" dance HERE.