Olajide Olayinka Williams "JJ" Olatunji, known professionally as KSI, is an English social media influencer, professional boxer, and musician. He is a co-founding member of YouTube group the Sidemen, the CEO of Misfits Boxing, and the co-owner of Prime Hydration, XIX Vodka, Sidemen Clothing, restaurant chain Sides, cereal brand Best Breakfasts, and snack brand Lunchly.
He registered his main YouTube channel in 2009 and built a following through his gaming commentary videos of the FIFA video game series. His content later diversified to include vlogs and comedy-style videos. As of October 2022, he had over 41 million subscribers and over 10 billion video views across his three YouTube channels. In 2021, he was listed among Forbes 30 Under 30 for the Europe Entertainment category. He has also ventured into acting, featuring in the British comedy film Laid in America in 2016. He was the subject of KSI: Can't Lose in 2018, a documentary film following the build-up to his first boxing match, and KSI: In Real Life in 2023, an Amazon Prime Video documentary film following his life from June 2021 to October 2022.
From Wikipedia (https://en.wikipedia.org/wiki/KSI) under Creative Commons Attribution CC-BY-SA 3.0 (http://creativecommons.org/licenses/by-sa/3.0/legalcode)