KSI accidentally smacked an actor in the face while filming the music video for his song 'DOMAIN' back in 2020.

Back then the British YouTube star was coming off back-to-back wins over his former American rival Logan Paul, so he already had some level of boxing experience under his belt.

So he can be forgiven for perhaps being a little bit over-zealous during a fight scene with several other actors.

KSI, real name Olajide Olatunji, was the target of a mock ambush down a narrow street.

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As the YouTuber proceeded to fight back against his surprise assailants, the actor tried to stop him and took a fist in the face for his troubles.

His glasses were knocked off his face as he felt the full impact of the swing.

JJ made quick work of the other two actors, before immediately going over to apologise to the poor unfortunate soul.

WATCH: KSI accidentally hits an actor in the face while filming the music video for his song 'DOMAIN'

Check out the video below...

KSI has received criticism after it was confirmed that his former friend Swarmz will replace Alex Wassabi.

However, he claims there was no other choice for that matter, as apparently it seems no-one else had the courage to share the ring with him at such short notice.

Speaking to talkSPORT, he said: “Because he wanted to fight me bro. He wanted to fight me, he called me out.

“We contracted him, we were like, ‘We’ll put you on the back-burner for if anything happens.’

“We were thinking we’d fight Alex and then move on, increase the level of opponents.

“But we got bamboozled with Alex pulling out so we were like, ‘Alright cool, I guess we’ll just have to fight Swarmz.’

“So yeah, believe it or not, a lot of people do not want to fight me with three weeks’ notice.

“I just have to deal with the situation and deal with somebody who wanted to fight me.

“Honestly, I have no idea.

“I have no idea, but the reason I did this anyway was to just get my feet wet, to get in the ring.

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“It’s a comeback fight. I just wanted to fight, that’s it.

“And then, after, increase the levels and show everyone that I’m about it bro.

“No matter the opponent, I’m training like it’s the hardest opponent of my life.

“And I’m gonna keep doing that because I know I’m gonna keep on unlocking the levels in myself and figuring out how good I can be.”