It has been 17 years since hit show The Fresh Prince of Bel-Air went off air, but cast members Will Smith, Alfonso Roberto, and Jeffrey "Jazzy Jeff" Townes haven't missed a beat.

Will Smith and his son Jaden Smith stopped by The Graham Norton Show to promote the movie After Earth. Will and Jaden both did a surprise freestyle after Graham Norton asks if the father-son duo ever rapped together.

Will raps about his previous appearance on The Graham Norton Show where he performed the Fresh Prince of Bel-Air theme song. The mention of the theme song was a segue to the surprise appearance of DJ Jazzy Jeff.

DJ Jazzy Jeff then played a mix of Will Smith's song "Switch" and The Fresh Prince of Bel-Air theme. Will and Jaden both rapped the theme.

Just when the crowd thought the performance was over, DJ Jazzy Jeff played Tom Jones's "It's Not Unusual" and Alfonso Ribeiro, aka Carlton Banks, makes an appearance and Will, Jaden, and Alfonso started doing "The Carlton".

Lastly, the trio danced to "Jump On It," recreating the unforgetable dance scene from Fresh Prince.

Prior to this televised reunion, Will, Alfonso, and Jazzy Jeff were spotted going to a London Club together to see Will's older son, Trey, DJ earlier this week.

Is there a full cast reunion in the works?