KSI
TrendingQuick Facts
- Full Name
- KSI
- Born
- June 19, 1993
- Birthplace
- —
- Age
- 33 years
- Zodiac Sign
- Gemini
- Height
- —
- Weight
- —
- Nationality
- 🇬🇧 United Kingdom
- Religion
- —
- Ethnicity
- —
- Eye Color
- —
- Hair Color
- —
- Net Worth
- —
- Education
- —
- Spouse
- —
- Children
- —
Last reviewed: Jul 30, 2026 · How we verify facts
Biography
KSI is 33 years old, a youtuber, from United Kingdom.
Olajide Olayinka Williams "JJ" Olatunji ( born 19 June 1993), known professionally as KSI, is a British 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.
Born in London to parents of Yoruba heritage and raised in Watford, KSI was privately educated at Berkhamsted School. He registered the YouTube channel KSIOlajidebt in 2009 and built a following through his commentary videos of the FIFA video game series. His content later diversified to include vlogs and comedic skits.
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