Olajide William “JJ” Olatunji (born 19 June 1993), better known as KSI, a shortened version of his online alias KSIOlajideBT, is a British YouTuber, internet personality, actor, rapper and white-collar boxer.
Olatunji’s main YouTube channel has accumulated over four billion video views and 20 million subscribers, making him the 65th most subscribed user on YouTube. Olatunji has also become well known for his music; he released his debut extended play, Keep Up, in 2016, reaching number one on the UK R&B Albums Chart as well as charting in several other countries. After releasing three more extended plays and singles, Olatunji released a collaborative album with Randolph, New Age, in 2019.
On 3 February 2018, Olatunji competed in his first white-collar amateur boxing match against fellow YouTube personality Joe Weller (KSI vs. Joe Weller) at the Copper Box Arena in Hackney Wick, London, winning the fight 1 minute and 30 seconds into the third round by way of technical knockout. On YouTube, the fight drew 1.6 million live viewers, 21 million views within a day, and over 25 million over the next several days, becoming the biggest white-collar boxing fight in history. Olatunji was awarded the YouTube Boxing Championship Belt. Olatunji expressed his respect for Weller after the fight for being “way harder, way tougher than I thought,” and praised him for his commitment to raising awareness on mental health issues. He then proceeded to call out American internet personality Logan Paul, his brother Jake Paul, and retired footballer Rio Ferdinand.
On the weekend of 24 February 2018, it was announced that the Paul brothers would be fighting the Olatunji brothers (Olatunji and his younger brother Deji, also known as ComedyShortsGamer) in a boxing match, with the matches divided between relative ages (the elder brothers KSI vs Logan Paul in one match and the younger brothers Deji Olatunji vs. Jake Paul in another match). One judge scored the fight in favor of Olatunji and two judges scored a draw, resulting in a majority draw. The fight has been labeled “the largest event in YouTube history” and “the largest ever amateur boxing fight”.