KSI
British YouTube personality, rapper, actor, and boxer
- Born
- 19 June 1993, London
- Citizenship
- United Kingdom, Nigeria
- Sport
- boxing
- Occupation
- YouTuber, rapper, boxer, gamer, television producer
- Height
- 178 cm (5 ft 10 in)
Olajide Olayinka Williams "JJ" Olatunji ( born 19 June 1993), known professionally as KSI, is a British YouTuber, influencer, musician, and former professional boxer. He is a co-founder and former member of YouTube group the Sidemen, the co-founder of Misfits Boxing and co-owner of several businesses, including Prime Hydration and Lunchly. KSI has also served as a judge on Britain's Got Talent since 2025. His main YouTube channel has over 19.2 million subscribers.
Awards and honours
- Silver Play Button 2011
- Gold Play Button 2012
- Diamond Play Button 2015
- Diamond Play Button 2020
External links
Facts from Wikidata Q16235544 (CC0); quoted introduction from English Wikipedia (CC BY-SA 4.0). Data retrieved 2026-10-22.
Data: Wikidata (CC0 1.0); Wikipedia (English) (CC BY-SA 4.0). Retrieved 2026-10-22.