Quick facts
At a Glance
Birthday
June 19, 1993
Age
33
Birth sign
Gemini
Nationality
United Kingdom, Nigeria
Known for
Singer/songwriter
Professions
YouTuber, Rapper, Boxer, Gamer
Profile Overview
Olajide Olayinka Williams "JJ" Olatunji, known professionally as KSI, is a British influencer, musician, and former professional boxer. He is a co-founding 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 2026.