KSI or JJ - real name Olajide Olatunji - is one of the most popular YouTube sensations, having amassed a whopping 16.3 million subscribers.
A hugely influential figure online, the 30-year-old has since turned his hand to combat sports, having fought equally as big names in Joe Weller and Logan Paul over the last few years.
Set to face Tommy Fury at the AO Arena in Manchester on Saturday, thousands of fans have already snapped up tickets, with millions more expected to tune in.
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With brands now seemingly queueing up to work with him, it begs the question as to how much the London-born star is really worth in 2023.
How much is KSI worth?
According to Forbes, JJ is worth an estimated £23.9 million, which places him second in the list of online content creators via their rankings. Mr Beast is currently #1 with £54 million.
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What companies is he involved in?
KSI is one of the founding members of the Sidemen, who boast a whopping 19.9 million subscribers on their own channel, as well as regularly hosting their annual Sidemen charity match.
He also launched the ever-growing energy drink 'Prime' alongside former foe Logan Paul this year, which is said to have amassed $250 million (£205 million) in sales since 2022.
Involved in music too, Olatunji has featured on songs alongside Craig David, Anne-Marie, Nathan Dawe and YungBlud to name just a few.
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Popular YouTube boxing promotion series 'Misfits' was also launched by KSI in 2023 and has since run six events.
Which brands has he worked with?
JJ has worked with the likes of Adidas, Puma and Microsoft to name a few. Those price of extra revenue streams are unknown, but the 30-year-old is one of the biggest names in the online scene and his negotiations will have no doubt included add-ons.
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How did KSI start out?
His original YouTube channel, KSIOljajideBT quickly rose to fame in 2009, as he posted videos of himself playing FIFA alongside either members of his family or his friends.
This soon developed into short-style skits and JJ even halted his education to continue in his pursuit of success away from the traditional route.
He has since seen his own accomplishments shared across to his friends channels too, with Miniminter, Zerkaa, TBJZL and brother Deji all visibly featuring.
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Featured Image Credit: GettyTopics: KSI, Tommy Fury, YouTube