Ryan Thomas posts shocking topless selfies that reveal his extreme weight loss on Celebrity Island with Bear Grylls

RYAN Thomas has revealed the full extent of his weight loss after taking part in Celebrity Island with Bear Grylls.

The former Coronation Street star survived a month on the show but lost an extreme amount of weight in the process, which he has documented on Instagram.

As the final episode aired last night, the 33-year-old told his fans he had been both ‘mentally and physically’ tested on the island, claiming he went eight days without food.

In his before shot he appears a normal size, while  in his after he looks dramatically smaller but surprisingly, with more defined muscles.

Alongside the shock comparison, he wrote: “The journey we’ve been on is indescribable.

“Not even a television show can put into perspective how mentally and physically we got tested on this island.

“My before and after is an example of the lack of food, 8 days no eating trying to survive with so little energy.”

The star continued: “I’m extremely proud of myself and my fellow islander. Couldn't have done it without you guys. The reason I love this show so much is because unlike any other there is no winner, it is a matter of survival and not about competing against each other.”

Despite feeling hungry  while on the island, Ryan had his now girlfriend Lucy Mecklenburgh to keep him in the right frame of mind and the pair got on so well during the challenge that they decided to give their relationship a go when they left the island.

Ryan said recently: "It was amazing to have Lucy there with me.

"We are of a similar age and she was a companion. It's nice having someone to look out for you. It was a real pleasure to have her there for me."

Meanwhile, Lucy also underwent a body transformation and lost a staggering two stone, which she also documented in before and after pictures.