KSI was visibly shocked after returning to his old room in the Sidemen house for the first time

The Sidemen returned to their first ever house for a tour and KSI couldn't believe what had happened to his old room.

The Sidemen are a popular YouTube group and well known for putting on major events such as their charity match at the London Stadium earlier this year, which was watched by over 2.5 million people online.

The group was formed in 2013 and consists of seven core members including JJ "KSI," Harry "W2S," Simon "Miniminter," Vikram "Vikkstar123," Tobi "TBJZL," Josh "Zerkaa," and Ethan "Behzinga".

Boasting over 20 million subscribers on their main YouTube channel, they have huge influence across the online world.

And they recently took a trip down to memory lane to remember where it all began in their first ever house together.

A clip of KSI taking a tour of his old room has since gone viral on social media, with the YouTuber-turned-boxer visibly shocked at the transformation.

Walking into the space, KSI was said: "Wow, wow. Holy sh*t man, this is...", before being left speechless.

Behzinga added: "This was how this was supposed to be used!"

Pointing to the TV, KSI said: "All I used from the house was this, everything else was bare man."

Tobi then pointed to a supersize bed and said: "What's this?" to which the new homeowner replied: "That's my bed bro!"

KSI joked: "Are you wrestling with it or something? What are you doing man, this is ridiculous," sparking laughter amongst the group.

Simon, better known as Miniminter then entered the room and took aim at how KSI previously used the space.

"You had a desk and a pile of clothes," he said.