UFC star Jon Jones shows incredible body transformation after revealing the date for his debut against Miocic at heavyweight

JON JONES is preparing for his long-awaited debut as a heavyweight. He has shown off his lean, mean body.

The ex-pound-for-pound king used his long hiatus to get fit and build muscle before he moved up in weight.

Jones weighed in at a staggering 255 lbs, almost TWO STONE more than his walkaround weight while he was competing at light heavyweight.

In a rare training video, however, the UFC Hall of Famer appears to have trimmed his stature.

Jones, 33, posted a clip on his Instagram of Jones going through a tough strength and conditioning workout.

Fans of MMA were quick to react to his larger physique. One tweeted: "He looks great tbh."

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Another one said, "Oh, he looks strong!" !"

Another said, "He's going to be bigger than most HWs."

One person commented, "He looks great!"

Another participant said, "I cannot wait to see him back at the octagon."

Jones hasn’t been inside the cage for nearly two-and–half years. His last fight was a decision win over Dominick Reyes.

Bones revealed that a fight for the interim title of heavyweight with Stipe Miocic, former champ, was in the cards. However, their match will most likely take place in September.

He tweeted: "Stipe says he will reach his absolute peak in September.

"I am disappointed, but I'm patient. I want the heavyweight GOT to be at his absolute best. I will wait until September. "No excuses."

Jones' absence from the cage was due in part to a contract dispute between the UFC brass. However, Richard Schaefer, his advisor insists that he is ready to return to action.

SunSport spoke with the former head of Golden Boy Promotions: "He has been training, and he's extremely smart about how bulk up and maintain the right weight. He does it in an intelligent manner."

"Not only eating well, but also gaining muscle mass.

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"He's been amazing about it; I have never seen anything similar."

"He is ready for fight, he's ready for fight."