Olajide Olayinka Williams "JJ" Olatunji (born: June 19, 1993 [age 27]), better known online as KSI (or KSIOlajidebt), is an English YouTuber, filmmaker, actor, rapper, and professional boxer mainly known for his boxing, diss-tracks, vlogs and challenges with the Sidemen.JJ has two solo YouTube channels, KSI and JJ Olatunji (formerly KSIOlajidebtHD). should reach. around August 1st, 2020* * rough estimate based on current trend

He is known for his FIFA, soccer, music, and comedy content. Here's how KSI, real name Olajide "JJ" William Olatunji, went from a suburban London upbringing to becoming one of the biggest YouTube stars in the world. 21.7M Subs. Trivia.

Olajide Olayinka Williams "JJ" Olatunji (/ ɒ l ə ˈ t u n dʒ iː /, oh-la-TUHN-jee; born 19 June 1993), known professionally as KSI, is a British YouTuber, internet personality and rapper known for his YouTube video content. He started uploading Goal of the Week videos to YouTube on May 16, 2011. Olajide Olatunji (also known as ‘JJ,’ ‘KSIOlajideBT,’ or simply ‘KSI’) is a UK based YouTube star, comedian, musician, and videogame commentator originally from Waterford, Hertfordshire, England. Before Fame. Born Olajide Olatunji and commonly known as KSI, he is a YouTube and social media phenomenon, particularly in the UK, who has amassed more than 21 million YouTube subscribers. KSI.