KSI
actor,composer,director
- Gender: Male
- Birthday: 1993-06-19 ( 31 years old )
- Place of Birth: Watford, England, UK
- Also Known As: KSI
- IMDB:nm6518846
Olajide Olayinka Williams “JJ” Olatunji, known online as KSI, is a British YouTuber, internet personality and rapper known for his YouTube video content. Olatunji is a member and co-founder of the entertainment collective known as the Sidemen, alongside six other British YouTubers, producing online videos and merchanise to a combined audience of over 53 million followers.