This is a Neville Longbottom kind of transformation.

Poor Leon Jackson may have come out on top of the fourth season of The X Factor but he never really hit the commercially successful heights like his fellow winners Leona Lewis or Shayne Ward. However, it looks like his time away from the spotlight has done him a world of good as he looks very different these days.

Quite the transformation, wouldn't you say?

If your jaw is currently on the floor, you're not the only one as plenty of X Factor fans have been sharing their disbelief online.

Since falling out of the limelight (having been dropped by Simon Cowell's label two years after his win), Jackson moved to Los Angeles where he needed "to fall in love with music again". Music and the gym, clearly.

According to Metro, Jackson is still "very much in the music industry, writing new material and performing shows across the pond after teaching himself to play piano and guitar". Beats having to go on Celebrity Big Brother we suppose.

Via Metro/Instagram